update readme

README.md

@@ -70,6 +70,6 @@ You can use the scripts inside *'colmap_runner/'* to generate camera parameters
 
 ## Visualize cameras in 3D
 Check *camera_visualizer/visualize_cameras.py* for visualizing cameras in 3D. It creates an interactive viewer for you to inspect whether your cameras have been normalized to be compatible with this codebase. Below is a screenshot of the viewer: green cameras are used for training, blue ones are for testing, while yellow ones denote a novel camera path to be synthesized.
-![](camera_visualizer/screenshot.png =250x)
+![](camera_visualizer/screenshot_lowres.png)