There should be an option to create RLE or uncompressed RLE in create_annotation_info independent of "is_crowd".

[wangg12]

@waspinator For example, for coco stuff task, they use RLE format segmentation and is_crowd is set to 0 or unset. If the segmentation in a custom dataset need to be represented by RLE, then it should be independent of "is_crowd", since the evaluation of iou would be wrong in when "is_crowd=True".