Expected structure

README.md

@@ -382,9 +382,24 @@ SIBR has many other functionalities, please see the [documentation](https://sibr
 </details>
 <br>
 
-## Preprocessing your own Scenes
+## Processing your own Scenes
 
-Our rasterization requires a SIMPLE_PINHOLE or PINHOLE camera model for COLMAP data. We provide a converter script ```convert.py```, to extract undistorted images and SfM information. Optionally, you can use ImageMagick to resize the undistorted images. This rescaling is similar to MipNeRF360, i.e., it creates images with 1/2, 1/4 and 1/8 the original resolution in corresponding folders. To use them, please first install a recent version of COLMAP (ideally CUDA-powered) and ImageMagick. Put the images you want to use in a directory ```<location>/input```.
+Our COLMAP loaders expect the following dataset structure in the source path location:
+
+```
+<location>
+|---images
+|   |---<image 0>
+|   |---<image 1>
+|   |---...
+|---sparse
+    |---0
+        |---cameras.bin  | cameras.txt
+        |---images.bin   | images.txt
+        |---points3D.bin | points3D.txt
+```
+
+For rasterization, the camera models must be either a SIMPLE_PINHOLE or PINHOLE camera. We provide a converter script ```convert.py```, to extract undistorted images and SfM information from input images. Optionally, you can use ImageMagick to resize the undistorted images. This rescaling is similar to MipNeRF360, i.e., it creates images with 1/2, 1/4 and 1/8 the original resolution in corresponding folders. To use them, please first install a recent version of COLMAP (ideally CUDA-powered) and ImageMagick. Put the images you want to use in a directory ```<location>/input```.
 ```
 <location>
 |---input