I am looking for some help with COCO jsons. I have a set of images that I have labelled with 10 sided polygons (blue blobs). I have another set of images with the ground truth areas (yellow blobs). I want to compare the area/number of pixels of the blue blobs with the yellow blobs. I have labelled the dataset with bounding boxes and converted them to COCO formatted jsons.

The ground truth image

The image that has been labelled

The json containing the polygon coordinates

Do I need a COCO to CSV converter? Some sort of masking thing? Thank you!!