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974 lines
32 KiB
Python
974 lines
32 KiB
Python
import json
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import logging
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import os
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import time
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from collections import OrderedDict
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import numpy as np
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import torch
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import torch.distributed
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import torch.multiprocessing
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import torch.nn as nn
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import torch.optim
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from tensorboardX import SummaryWriter
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from torch.nn.parallel import DistributedDataParallel as DDP
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from tqdm import tqdm
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from data_loader_split import load_data_split
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from ddp_model import NerfNetWithAutoExpo
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from utils import TINY_NUMBER, colorize, img2mse, img_HWC2CHW, mse2psnr
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logger = logging.getLogger(__package__)
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def setup_logger():
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# create logger
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logger = logging.getLogger(__package__)
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# logger.setLevel(logging.DEBUG)
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logger.setLevel(logging.INFO)
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# create console handler and set level to debug
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ch = logging.StreamHandler()
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ch.setLevel(logging.DEBUG)
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# create formatter
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formatter = logging.Formatter(
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"%(asctime)s [%(levelname)s] %(name)s: %(message)s"
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)
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# add formatter to ch
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ch.setFormatter(formatter)
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# add ch to logger
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logger.addHandler(ch)
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def intersect_sphere(ray_o, ray_d):
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"""
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ray_o, ray_d: [..., 3]
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compute the depth of the intersection point between this ray and unit sphere
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"""
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# note: d1 becomes negative if this mid point is behind camera
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d1 = -torch.sum(ray_d * ray_o, dim=-1) / torch.sum(ray_d * ray_d, dim=-1)
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p = ray_o + d1.unsqueeze(-1) * ray_d
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# consider the case where the ray does not intersect the sphere
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ray_d_cos = 1.0 / torch.norm(ray_d, dim=-1)
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p_norm_sq = torch.sum(p * p, dim=-1)
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if (p_norm_sq >= 1.0).any():
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raise Exception(
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"Not all your cameras are bounded by the unit sphere; "
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"please make sure the cameras are normalized properly!"
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)
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d2 = torch.sqrt(1.0 - p_norm_sq) * ray_d_cos
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return d1 + d2
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def perturb_samples(z_vals):
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# get intervals between samples
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mids = 0.5 * (z_vals[..., 1:] + z_vals[..., :-1])
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upper = torch.cat([mids, z_vals[..., -1:]], dim=-1)
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lower = torch.cat([z_vals[..., 0:1], mids], dim=-1)
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# uniform samples in those intervals
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t_rand = torch.rand_like(z_vals)
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z_vals = lower + (upper - lower) * t_rand # [N_rays, N_samples]
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return z_vals
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def sample_pdf(bins, weights, N_samples, det=False):
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"""
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:param bins: tensor of shape [..., M+1], M is the number of bins
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:param weights: tensor of shape [..., M]
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:param N_samples: number of samples along each ray
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:param det: if True, will perform deterministic sampling
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:return: [..., N_samples]
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"""
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# Get pdf
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weights = weights + TINY_NUMBER # prevent nans
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pdf = weights / torch.sum(weights, dim=-1, keepdim=True) # [..., M]
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cdf = torch.cumsum(pdf, dim=-1) # [..., M]
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cdf = torch.cat(
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[torch.zeros_like(cdf[..., 0:1]), cdf], dim=-1
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) # [..., M+1]
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# Take uniform samples
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dots_sh = list(weights.shape[:-1])
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M = weights.shape[-1]
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min_cdf = 0.00
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max_cdf = 1.00 # prevent outlier samples
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if det:
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u = torch.linspace(min_cdf, max_cdf, N_samples, device=bins.device)
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u = u.view([1] * len(dots_sh) + [N_samples]).expand(
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dots_sh
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+ [
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N_samples,
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]
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) # [..., N_samples]
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else:
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sh = dots_sh + [N_samples]
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u = (
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torch.rand(*sh, device=bins.device) * (max_cdf - min_cdf) + min_cdf
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) # [..., N_samples]
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# Invert CDF
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# [..., N_samples, 1] >= [..., 1, M] ----> [..., N_samples, M] ----> [..., N_samples,]
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above_inds = torch.sum(
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u.unsqueeze(-1) >= cdf[..., :M].unsqueeze(-2), dim=-1
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).long()
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# random sample inside each bin
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below_inds = torch.clamp(above_inds - 1, min=0)
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inds_g = torch.stack(
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(below_inds, above_inds), dim=-1
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) # [..., N_samples, 2]
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cdf = cdf.unsqueeze(-2).expand(
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dots_sh + [N_samples, M + 1]
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) # [..., N_samples, M+1]
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cdf_g = torch.gather(
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input=cdf, dim=-1, index=inds_g
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) # [..., N_samples, 2]
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bins = bins.unsqueeze(-2).expand(
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dots_sh + [N_samples, M + 1]
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) # [..., N_samples, M+1]
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bins_g = torch.gather(
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input=bins, dim=-1, index=inds_g
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) # [..., N_samples, 2]
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# fix numeric issue
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denom = cdf_g[..., 1] - cdf_g[..., 0] # [..., N_samples]
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denom = torch.where(denom < TINY_NUMBER, torch.ones_like(denom), denom)
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t = (u - cdf_g[..., 0]) / denom
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samples = bins_g[..., 0] + t * (
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bins_g[..., 1] - bins_g[..., 0] + TINY_NUMBER
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)
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return samples
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def render_single_image(rank, world_size, models, ray_sampler, chunk_size):
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##### parallel rendering of a single image
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ray_batch = ray_sampler.get_all()
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if (ray_batch["ray_d"].shape[0] // world_size) * world_size != ray_batch[
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"ray_d"
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].shape[0]:
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raise Exception(
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"Number of pixels in the image is not divisible by the number of GPUs!\n\t# pixels: {}\n\t# GPUs: {}".format(
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ray_batch["ray_d"].shape[0], world_size
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)
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)
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# split into ranks; make sure different processes don't overlap
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rank_split_sizes = [
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ray_batch["ray_d"].shape[0] // world_size,
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] * world_size
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rank_split_sizes[-1] = ray_batch["ray_d"].shape[0] - sum(
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rank_split_sizes[:-1]
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)
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for key in ray_batch:
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if torch.is_tensor(ray_batch[key]):
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ray_batch[key] = torch.split(ray_batch[key], rank_split_sizes)[
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rank
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].to(rank)
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# split into chunks and render inside each process
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ray_batch_split = OrderedDict()
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for key in ray_batch:
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if torch.is_tensor(ray_batch[key]):
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ray_batch_split[key] = torch.split(ray_batch[key], chunk_size)
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# forward and backward
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ret_merge_chunk = [OrderedDict() for _ in range(models["cascade_level"])]
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for s in range(len(ray_batch_split["ray_d"])):
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ray_o = ray_batch_split["ray_o"][s]
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ray_d = ray_batch_split["ray_d"][s]
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min_depth = ray_batch_split["min_depth"][s]
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dots_sh = list(ray_d.shape[:-1])
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for m in range(models["cascade_level"]):
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net = models["net_{}".format(m)]
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# sample depths
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N_samples = models["cascade_samples"][m]
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if m == 0:
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# foreground depth
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fg_far_depth = intersect_sphere(ray_o, ray_d) # [...,]
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fg_near_depth = min_depth # [..., ]
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step = (fg_far_depth - fg_near_depth) / (N_samples - 1)
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fg_depth = torch.stack(
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[fg_near_depth + i * step for i in range(N_samples)],
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dim=-1,
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) # [..., N_samples]
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# background depth
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bg_depth = (
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torch.linspace(0.0, 1.0, N_samples)
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.view(
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[
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1,
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]
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* len(dots_sh)
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+ [
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N_samples,
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]
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)
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.expand(
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dots_sh
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+ [
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N_samples,
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]
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)
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.to(rank)
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)
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# delete unused memory
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del fg_near_depth
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del step
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torch.cuda.empty_cache()
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else:
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# sample pdf and concat with earlier samples
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fg_weights = ret["fg_weights"].clone().detach()
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fg_depth_mid = 0.5 * (
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fg_depth[..., 1:] + fg_depth[..., :-1]
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) # [..., N_samples-1]
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fg_weights = fg_weights[..., 1:-1] # [..., N_samples-2]
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fg_depth_samples = sample_pdf(
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bins=fg_depth_mid,
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weights=fg_weights,
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N_samples=N_samples,
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det=True,
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) # [..., N_samples]
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fg_depth, _ = torch.sort(
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torch.cat((fg_depth, fg_depth_samples), dim=-1)
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)
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# sample pdf and concat with earlier samples
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bg_weights = ret["bg_weights"].clone().detach()
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bg_depth_mid = 0.5 * (bg_depth[..., 1:] + bg_depth[..., :-1])
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bg_weights = bg_weights[..., 1:-1] # [..., N_samples-2]
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bg_depth_samples = sample_pdf(
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bins=bg_depth_mid,
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weights=bg_weights,
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N_samples=N_samples,
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det=True,
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) # [..., N_samples]
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bg_depth, _ = torch.sort(
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torch.cat((bg_depth, bg_depth_samples), dim=-1)
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)
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# delete unused memory
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del fg_weights
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del fg_depth_mid
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del fg_depth_samples
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del bg_weights
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del bg_depth_mid
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del bg_depth_samples
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torch.cuda.empty_cache()
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with torch.no_grad():
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ret = net(ray_o, ray_d, fg_far_depth, fg_depth, bg_depth)
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for key in ret:
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if key not in ["fg_weights", "bg_weights"]:
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if torch.is_tensor(ret[key]):
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if key not in ret_merge_chunk[m]:
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ret_merge_chunk[m][key] = [
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ret[key].cpu(),
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]
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else:
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ret_merge_chunk[m][key].append(ret[key].cpu())
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ret[key] = None
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# clean unused memory
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torch.cuda.empty_cache()
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# merge results from different chunks
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for m in range(len(ret_merge_chunk)):
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for key in ret_merge_chunk[m]:
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ret_merge_chunk[m][key] = torch.cat(ret_merge_chunk[m][key], dim=0)
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# merge results from different processes
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if rank == 0:
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ret_merge_rank = [OrderedDict() for _ in range(len(ret_merge_chunk))]
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for m in range(len(ret_merge_chunk)):
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for key in ret_merge_chunk[m]:
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# generate tensors to store results from other processes
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sh = list(ret_merge_chunk[m][key].shape[1:])
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ret_merge_rank[m][key] = [
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torch.zeros(
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*[
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size,
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]
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+ sh,
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dtype=torch.float32
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)
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for size in rank_split_sizes
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]
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torch.distributed.gather(
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ret_merge_chunk[m][key], ret_merge_rank[m][key]
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)
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ret_merge_rank[m][key] = (
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torch.cat(ret_merge_rank[m][key], dim=0)
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.reshape((ray_sampler.H, ray_sampler.W, -1))
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.squeeze()
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)
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# print(m, key, ret_merge_rank[m][key].shape)
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else: # send results to main process
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for m in range(len(ret_merge_chunk)):
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for key in ret_merge_chunk[m]:
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torch.distributed.gather(ret_merge_chunk[m][key])
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# only rank 0 program returns
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if rank == 0:
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return ret_merge_rank
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else:
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return None
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def log_view_to_tb(writer, global_step, log_data, gt_img, mask, prefix=""):
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rgb_im = img_HWC2CHW(torch.from_numpy(gt_img))
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writer.add_image(prefix + "rgb_gt", rgb_im, global_step)
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for m in range(len(log_data)):
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rgb_im = img_HWC2CHW(log_data[m]["rgb"])
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rgb_im = torch.clamp(
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rgb_im, min=0.0, max=1.0
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) # just in case diffuse+specular>1
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writer.add_image(
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prefix + "level_{}/rgb".format(m), rgb_im, global_step
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)
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rgb_im = img_HWC2CHW(log_data[m]["fg_rgb"])
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rgb_im = torch.clamp(
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rgb_im, min=0.0, max=1.0
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) # just in case diffuse+specular>1
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writer.add_image(
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prefix + "level_{}/fg_rgb".format(m), rgb_im, global_step
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)
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depth = log_data[m]["fg_depth"]
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depth_im = img_HWC2CHW(
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colorize(depth, cmap_name="jet", append_cbar=True, mask=mask)
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)
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writer.add_image(
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prefix + "level_{}/fg_depth".format(m), depth_im, global_step
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)
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rgb_im = img_HWC2CHW(log_data[m]["bg_rgb"])
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rgb_im = torch.clamp(
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rgb_im, min=0.0, max=1.0
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) # just in case diffuse+specular>1
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writer.add_image(
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prefix + "level_{}/bg_rgb".format(m), rgb_im, global_step
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)
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depth = log_data[m]["bg_depth"]
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depth_im = img_HWC2CHW(
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colorize(depth, cmap_name="jet", append_cbar=True, mask=mask)
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)
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writer.add_image(
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prefix + "level_{}/bg_depth".format(m), depth_im, global_step
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)
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bg_lambda = log_data[m]["bg_lambda"]
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bg_lambda_im = img_HWC2CHW(
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colorize(bg_lambda, cmap_name="hot", append_cbar=True, mask=mask)
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)
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writer.add_image(
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prefix + "level_{}/bg_lambda".format(m), bg_lambda_im, global_step
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)
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|
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def setup(rank, world_size):
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os.environ["MASTER_ADDR"] = "localhost"
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# port = np.random.randint(12355, 12399)
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# os.environ['MASTER_PORT'] = '{}'.format(port)
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os.environ["MASTER_PORT"] = "12355"
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# initialize the process group
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torch.distributed.init_process_group(
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"gloo", rank=rank, world_size=world_size
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)
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|
|
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def cleanup():
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torch.distributed.destroy_process_group()
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|
|
|
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def create_nerf(rank, args):
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###### create network and wrap in ddp; each process should do this
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# fix random seed just to make sure the network is initialized with same weights at different processes
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torch.manual_seed(777)
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# very important!!! otherwise it might introduce extra memory in rank=0 gpu
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torch.cuda.set_device(rank)
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models = OrderedDict()
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models["cascade_level"] = args.cascade_level
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models["cascade_samples"] = [
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int(x.strip()) for x in args.cascade_samples.split(",")
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]
|
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for m in range(models["cascade_level"]):
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img_names = None
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if args.optim_autoexpo:
|
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# load training image names for autoexposure
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f = os.path.join(args.basedir, args.expname, "train_images.json")
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with open(f) as file:
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img_names = json.load(file)
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net = NerfNetWithAutoExpo(
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args, optim_autoexpo=args.optim_autoexpo, img_names=img_names
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).to(rank)
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net = DDP(
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net,
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device_ids=[rank],
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output_device=rank,
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find_unused_parameters=True,
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)
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# net = DDP(net, device_ids=[rank], output_device=rank)
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optim = torch.optim.Adam(net.parameters(), lr=args.lrate)
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models["net_{}".format(m)] = net
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models["optim_{}".format(m)] = optim
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|
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start = -1
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|
|
###### load pretrained weights; each process should do this
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if (args.ckpt_path is not None) and (os.path.isfile(args.ckpt_path)):
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ckpts = [args.ckpt_path]
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else:
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ckpts = [
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os.path.join(args.basedir, args.expname, f)
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for f in sorted(
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os.listdir(os.path.join(args.basedir, args.expname))
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)
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if f.endswith(".pth")
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]
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def path2iter(path):
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tmp = os.path.basename(path)[:-4]
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idx = tmp.rfind("_")
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return int(tmp[idx + 1 :])
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ckpts = sorted(ckpts, key=path2iter)
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logger.info("Found ckpts: {}".format(ckpts))
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if len(ckpts) > 0 and not args.no_reload:
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fpath = ckpts[-1]
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logger.info("Reloading from: {}".format(fpath))
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start = path2iter(fpath)
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# configure map_location properly for different processes
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map_location = {"cuda:%d" % 0: "cuda:%d" % rank}
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to_load = torch.load(fpath, map_location=map_location)
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for m in range(models["cascade_level"]):
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for name in ["net_{}".format(m), "optim_{}".format(m)]:
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models[name].load_state_dict(to_load[name])
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return start, models
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|
|
|
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def ddp_train_nerf(rank, args):
|
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###### set up multi-processing
|
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setup(rank, args.world_size)
|
|
###### set up logger
|
|
logger = logging.getLogger(__package__)
|
|
setup_logger()
|
|
|
|
###### decide chunk size according to gpu memory
|
|
logger.info(
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"gpu_mem: {}".format(
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torch.cuda.get_device_properties(rank).total_memory
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)
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)
|
|
if torch.cuda.get_device_properties(rank).total_memory / 1e9 > 14:
|
|
logger.info("setting batch size according to 24G gpu")
|
|
args.N_rand = 1024
|
|
args.chunk_size = 8192
|
|
else:
|
|
logger.info("setting batch size according to 12G gpu")
|
|
args.N_rand = 512
|
|
args.chunk_size = 4096
|
|
|
|
###### Create log dir and copy the config file
|
|
if rank == 0:
|
|
os.makedirs(os.path.join(args.basedir, args.expname), exist_ok=True)
|
|
f = os.path.join(args.basedir, args.expname, "args.txt")
|
|
with open(f, "w") as file:
|
|
for arg in sorted(vars(args)):
|
|
attr = getattr(args, arg)
|
|
file.write("{} = {}\n".format(arg, attr))
|
|
if args.config is not None:
|
|
f = os.path.join(args.basedir, args.expname, "config.txt")
|
|
with open(f, "w") as file:
|
|
file.write(open(args.config, "r").read())
|
|
torch.distributed.barrier()
|
|
|
|
ray_samplers = load_data_split(
|
|
args.datadir,
|
|
args.scene,
|
|
split="train",
|
|
try_load_min_depth=args.load_min_depth,
|
|
)
|
|
val_ray_samplers = load_data_split(
|
|
args.datadir,
|
|
args.scene,
|
|
split="validation",
|
|
try_load_min_depth=args.load_min_depth,
|
|
skip=args.testskip,
|
|
)
|
|
|
|
# write training image names for autoexposure
|
|
if args.optim_autoexpo:
|
|
f = os.path.join(args.basedir, args.expname, "train_images.json")
|
|
with open(f, "w") as file:
|
|
img_names = [
|
|
ray_samplers[i].img_path for i in range(len(ray_samplers))
|
|
]
|
|
json.dump(img_names, file, indent=2)
|
|
|
|
###### create network and wrap in ddp; each process should do this
|
|
start, models = create_nerf(rank, args)
|
|
|
|
##### important!!!
|
|
# make sure different processes sample different rays
|
|
np.random.seed((rank + 1) * 777)
|
|
# make sure different processes have different perturbations in depth samples
|
|
torch.manual_seed((rank + 1) * 777)
|
|
|
|
##### only main process should do the logging
|
|
if rank == 0:
|
|
writer = SummaryWriter(
|
|
os.path.join(args.basedir, "summaries", args.expname)
|
|
)
|
|
|
|
# start training
|
|
what_val_to_log = 0 # helper variable for parallel rendering of a image
|
|
what_train_to_log = 0
|
|
for global_step in tqdm(range(start + 1, start + 1 + args.N_iters)):
|
|
time0 = time.time()
|
|
scalars_to_log = OrderedDict()
|
|
### Start of core optimization loop
|
|
scalars_to_log["resolution"] = ray_samplers[0].resolution_level
|
|
# randomly sample rays and move to device
|
|
i = np.random.randint(low=0, high=len(ray_samplers))
|
|
ray_batch = ray_samplers[i].random_sample(
|
|
args.N_rand, center_crop=False
|
|
)
|
|
for key in ray_batch:
|
|
if torch.is_tensor(ray_batch[key]):
|
|
ray_batch[key] = ray_batch[key].to(rank)
|
|
|
|
# forward and backward
|
|
dots_sh = list(ray_batch["ray_d"].shape[:-1]) # number of rays
|
|
all_rets = [] # results on different cascade levels
|
|
for m in range(models["cascade_level"]):
|
|
optim = models["optim_{}".format(m)]
|
|
net = models["net_{}".format(m)]
|
|
|
|
# sample depths
|
|
N_samples = models["cascade_samples"][m]
|
|
if m == 0:
|
|
# foreground depth
|
|
fg_far_depth = intersect_sphere(
|
|
ray_batch["ray_o"], ray_batch["ray_d"]
|
|
) # [...,]
|
|
fg_near_depth = ray_batch["min_depth"] # [..., ]
|
|
step = (fg_far_depth - fg_near_depth) / (N_samples - 1)
|
|
fg_depth = torch.stack(
|
|
[fg_near_depth + i * step for i in range(N_samples)],
|
|
dim=-1,
|
|
) # [..., N_samples]
|
|
fg_depth = perturb_samples(
|
|
fg_depth
|
|
) # random perturbation during training
|
|
|
|
# background depth
|
|
bg_depth = (
|
|
torch.linspace(0.0, 1.0, N_samples)
|
|
.view(
|
|
[
|
|
1,
|
|
]
|
|
* len(dots_sh)
|
|
+ [
|
|
N_samples,
|
|
]
|
|
)
|
|
.expand(
|
|
dots_sh
|
|
+ [
|
|
N_samples,
|
|
]
|
|
)
|
|
.to(rank)
|
|
)
|
|
bg_depth = perturb_samples(
|
|
bg_depth
|
|
) # random perturbation during training
|
|
else:
|
|
# sample pdf and concat with earlier samples
|
|
fg_weights = ret["fg_weights"].clone().detach()
|
|
fg_depth_mid = 0.5 * (
|
|
fg_depth[..., 1:] + fg_depth[..., :-1]
|
|
) # [..., N_samples-1]
|
|
fg_weights = fg_weights[..., 1:-1] # [..., N_samples-2]
|
|
fg_depth_samples = sample_pdf(
|
|
bins=fg_depth_mid,
|
|
weights=fg_weights,
|
|
N_samples=N_samples,
|
|
det=False,
|
|
) # [..., N_samples]
|
|
fg_depth, _ = torch.sort(
|
|
torch.cat((fg_depth, fg_depth_samples), dim=-1)
|
|
)
|
|
|
|
# sample pdf and concat with earlier samples
|
|
bg_weights = ret["bg_weights"].clone().detach()
|
|
bg_depth_mid = 0.5 * (bg_depth[..., 1:] + bg_depth[..., :-1])
|
|
bg_weights = bg_weights[..., 1:-1] # [..., N_samples-2]
|
|
bg_depth_samples = sample_pdf(
|
|
bins=bg_depth_mid,
|
|
weights=bg_weights,
|
|
N_samples=N_samples,
|
|
det=False,
|
|
) # [..., N_samples]
|
|
bg_depth, _ = torch.sort(
|
|
torch.cat((bg_depth, bg_depth_samples), dim=-1)
|
|
)
|
|
|
|
optim.zero_grad()
|
|
ret = net(
|
|
ray_batch["ray_o"],
|
|
ray_batch["ray_d"],
|
|
fg_far_depth,
|
|
fg_depth,
|
|
bg_depth,
|
|
img_name=ray_batch["img_name"],
|
|
)
|
|
all_rets.append(ret)
|
|
|
|
rgb_gt = ray_batch["rgb"].to(rank)
|
|
if "autoexpo" in ret:
|
|
scale, shift = ret["autoexpo"]
|
|
scalars_to_log[
|
|
"level_{}/autoexpo_scale".format(m)
|
|
] = scale.item()
|
|
scalars_to_log[
|
|
"level_{}/autoexpo_shift".format(m)
|
|
] = shift.item()
|
|
# rgb_gt = scale * rgb_gt + shift
|
|
rgb_pred = (ret["rgb"] - shift) / scale
|
|
rgb_loss = img2mse(rgb_pred, rgb_gt)
|
|
loss = rgb_loss + args.lambda_autoexpo * (
|
|
torch.abs(scale - 1.0) + torch.abs(shift)
|
|
)
|
|
else:
|
|
rgb_loss = img2mse(ret["rgb"], rgb_gt)
|
|
loss = rgb_loss
|
|
scalars_to_log["level_{}/loss".format(m)] = rgb_loss.item()
|
|
scalars_to_log["level_{}/pnsr".format(m)] = mse2psnr(
|
|
rgb_loss.item()
|
|
)
|
|
loss.backward()
|
|
optim.step()
|
|
|
|
# # clean unused memory
|
|
# torch.cuda.empty_cache()
|
|
|
|
### end of core optimization loop
|
|
dt = time.time() - time0
|
|
scalars_to_log["iter_time"] = dt
|
|
|
|
### only main process should do the logging
|
|
if rank == 0 and (global_step % args.i_print == 0 or global_step < 10):
|
|
logstr = "{} step: {} ".format(args.expname, global_step)
|
|
for k in scalars_to_log:
|
|
logstr += " {}: {:.6f}".format(k, scalars_to_log[k])
|
|
writer.add_scalar(k, scalars_to_log[k], global_step)
|
|
logger.info(logstr)
|
|
|
|
### each process should do this; but only main process merges the results
|
|
if global_step % args.i_img == 0 or global_step == start + 1:
|
|
#### critical: make sure each process is working on the same random image
|
|
time0 = time.time()
|
|
idx = what_val_to_log % len(val_ray_samplers)
|
|
log_data = render_single_image(
|
|
rank,
|
|
args.world_size,
|
|
models,
|
|
val_ray_samplers[idx],
|
|
args.chunk_size,
|
|
)
|
|
what_val_to_log += 1
|
|
dt = time.time() - time0
|
|
if rank == 0: # only main process should do this
|
|
logger.info(
|
|
"Logged a random validation view in {} seconds".format(dt)
|
|
)
|
|
log_view_to_tb(
|
|
writer,
|
|
global_step,
|
|
log_data,
|
|
gt_img=val_ray_samplers[idx].get_img(),
|
|
mask=None,
|
|
prefix="val/",
|
|
)
|
|
|
|
time0 = time.time()
|
|
idx = what_train_to_log % len(ray_samplers)
|
|
log_data = render_single_image(
|
|
rank,
|
|
args.world_size,
|
|
models,
|
|
ray_samplers[idx],
|
|
args.chunk_size,
|
|
)
|
|
what_train_to_log += 1
|
|
dt = time.time() - time0
|
|
if rank == 0: # only main process should do this
|
|
logger.info(
|
|
"Logged a random training view in {} seconds".format(dt)
|
|
)
|
|
log_view_to_tb(
|
|
writer,
|
|
global_step,
|
|
log_data,
|
|
gt_img=ray_samplers[idx].get_img(),
|
|
mask=None,
|
|
prefix="train/",
|
|
)
|
|
|
|
del log_data
|
|
torch.cuda.empty_cache()
|
|
|
|
if rank == 0 and (
|
|
global_step % args.i_weights == 0 and global_step > 0
|
|
):
|
|
# saving checkpoints and logging
|
|
fpath = os.path.join(
|
|
args.basedir,
|
|
args.expname,
|
|
"model_{:06d}.pth".format(global_step),
|
|
)
|
|
to_save = OrderedDict()
|
|
for m in range(models["cascade_level"]):
|
|
name = "net_{}".format(m)
|
|
to_save[name] = models[name].state_dict()
|
|
|
|
name = "optim_{}".format(m)
|
|
to_save[name] = models[name].state_dict()
|
|
torch.save(to_save, fpath)
|
|
|
|
# clean up for multi-processing
|
|
cleanup()
|
|
|
|
|
|
def config_parser():
|
|
import configargparse
|
|
|
|
parser = configargparse.ArgumentParser()
|
|
parser.add_argument(
|
|
"--config",
|
|
is_config_file=True,
|
|
help="config file path",
|
|
)
|
|
parser.add_argument(
|
|
"--expname",
|
|
type=str,
|
|
help="experiment name",
|
|
)
|
|
parser.add_argument(
|
|
"--basedir",
|
|
type=str,
|
|
default="./logs/",
|
|
help="where to store ckpts and logs",
|
|
)
|
|
# dataset options
|
|
parser.add_argument(
|
|
"--datadir",
|
|
type=str,
|
|
default=None,
|
|
help="input data directory",
|
|
)
|
|
parser.add_argument(
|
|
"--scene",
|
|
type=str,
|
|
default=None,
|
|
help="scene name",
|
|
)
|
|
parser.add_argument(
|
|
"--testskip",
|
|
type=int,
|
|
default=8,
|
|
help="will load 1/N images from test/val sets, useful for large datasets like deepvoxels",
|
|
)
|
|
# model size
|
|
parser.add_argument(
|
|
"--netdepth",
|
|
type=int,
|
|
default=8,
|
|
help="layers in coarse network",
|
|
)
|
|
parser.add_argument(
|
|
"--netwidth",
|
|
type=int,
|
|
default=256,
|
|
help="channels per layer in coarse network",
|
|
)
|
|
parser.add_argument(
|
|
"--use_viewdirs",
|
|
action="store_true",
|
|
help="use full 5D input instead of 3D",
|
|
)
|
|
# checkpoints
|
|
parser.add_argument(
|
|
"--no_reload",
|
|
action="store_true",
|
|
help="do not reload weights from saved ckpt",
|
|
)
|
|
parser.add_argument(
|
|
"--ckpt_path",
|
|
type=str,
|
|
default=None,
|
|
help="specific weights npy file to reload for coarse network",
|
|
)
|
|
# batch size
|
|
parser.add_argument(
|
|
"--N_rand",
|
|
type=int,
|
|
default=32 * 32 * 2,
|
|
help="batch size (number of random rays per gradient step)",
|
|
)
|
|
parser.add_argument(
|
|
"--chunk_size",
|
|
type=int,
|
|
default=1024 * 8,
|
|
help="number of rays processed in parallel, decrease if running out of memory",
|
|
)
|
|
# iterations
|
|
parser.add_argument(
|
|
"--N_iters",
|
|
type=int,
|
|
default=250001,
|
|
help="number of iterations",
|
|
)
|
|
# render only
|
|
parser.add_argument(
|
|
"--render_splits",
|
|
type=str,
|
|
default="test",
|
|
help="splits to render",
|
|
)
|
|
# cascade training
|
|
parser.add_argument(
|
|
"--cascade_level",
|
|
type=int,
|
|
default=2,
|
|
help="number of cascade levels",
|
|
)
|
|
parser.add_argument(
|
|
"--cascade_samples",
|
|
type=str,
|
|
default="64,64",
|
|
help="samples at each level",
|
|
)
|
|
# multiprocess learning
|
|
parser.add_argument(
|
|
"--world_size",
|
|
type=int,
|
|
default="-1",
|
|
help="number of processes (GPU). defaults to -1 for every GPU.",
|
|
)
|
|
# optimize autoexposure
|
|
parser.add_argument(
|
|
"--optim_autoexpo",
|
|
action="store_true",
|
|
help="optimize autoexposure parameters",
|
|
)
|
|
parser.add_argument(
|
|
"--lambda_autoexpo",
|
|
type=float,
|
|
default=1.0,
|
|
help="regularization weight for autoexposure",
|
|
)
|
|
|
|
# learning rate options
|
|
parser.add_argument(
|
|
"--lrate",
|
|
type=float,
|
|
default=5e-4,
|
|
help="learning rate",
|
|
)
|
|
parser.add_argument(
|
|
"--lrate_decay_factor",
|
|
type=float,
|
|
default=0.1,
|
|
help="decay learning rate by a factor every specified number of steps",
|
|
)
|
|
parser.add_argument(
|
|
"--lrate_decay_steps",
|
|
type=int,
|
|
default=5000,
|
|
help="decay learning rate by a factor every specified number of steps",
|
|
)
|
|
# rendering options
|
|
parser.add_argument(
|
|
"--det",
|
|
action="store_true",
|
|
help="deterministic sampling for coarse and fine samples",
|
|
)
|
|
parser.add_argument(
|
|
"--max_freq_log2",
|
|
type=int,
|
|
default=10,
|
|
help="log2 of max freq for positional encoding (3D location)",
|
|
)
|
|
parser.add_argument(
|
|
"--max_freq_log2_viewdirs",
|
|
type=int,
|
|
default=4,
|
|
help="log2 of max freq for positional encoding (2D direction)",
|
|
)
|
|
parser.add_argument(
|
|
"--load_min_depth",
|
|
action="store_true",
|
|
help="whether to load min depth",
|
|
)
|
|
# logging/saving options
|
|
parser.add_argument(
|
|
"--i_print",
|
|
type=int,
|
|
default=100,
|
|
help="frequency of console printout and metric loggin",
|
|
)
|
|
parser.add_argument(
|
|
"--i_img",
|
|
type=int,
|
|
default=500,
|
|
help="frequency of tensorboard image logging",
|
|
)
|
|
parser.add_argument(
|
|
"--i_weights",
|
|
type=int,
|
|
default=10000,
|
|
help="frequency of weight ckpt saving",
|
|
)
|
|
|
|
return parser
|
|
|
|
|
|
def train():
|
|
parser = config_parser()
|
|
args = parser.parse_args()
|
|
logger.info(parser.format_values())
|
|
|
|
if args.world_size == -1:
|
|
args.world_size = torch.cuda.device_count()
|
|
logger.info("Using # gpus: {}".format(args.world_size))
|
|
torch.multiprocessing.spawn(
|
|
ddp_train_nerf, args=(args,), nprocs=args.world_size, join=True
|
|
)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
setup_logger()
|
|
train()
|