Add CamVid to documentation

cvat/apps/dataset_manager/formats/README.md

@@ -19,6 +19,7 @@
   - [YOLO](#yolo)
   - [TF detection API](#tfrecord)
   - [ImageNet](#imagenet)
+  - [CamVid](#camvid)
 
 ## How to add a new annotation format support<a id="how-to-add"></a>
 
@@ -835,3 +836,41 @@ taskname.zip/
 Uploaded file: a zip archive of the structure above
 
 - supported annotations: Labels
+
+### [CamVid](http://mi.eng.cam.ac.uk/research/projects/VideoRec/CamVid/)<a id="camvid" />
+
+#### CamVid Dumper
+
+Downloaded file: a zip archive of the following structure:
+
+```bash
+taskname.zip/
+├── labelmap.txt # optional, required for non-CamVid labels
+└── <any_subset_name>/
+    ├── image1.png
+    └── image2.png
+└── <any_subset_name>annot/
+    ├── image1.png
+    └── image2.png
+└── <any_subset_name>.txt
+
+# labelmap.txt
+# color (RGB) label
+0 0 0 Void
+64 128 64 Animal
+192 0 128 Archway
+0 128 192 Bicyclist
+0 128 64 Bridge
+```
+
+Mask is a `png` image with 1 or 3 channels where each pixel
+has own color which corresponds to a label.
+`(0, 0, 0)` is used for background by default.
+
+- supported annotations: Rectangles, Polygons
+
+#### CamVid Loader
+
+Uploaded file: a zip archive of the structure above
+
+- supported annotations: Polygons