How does the "filename" field in MFNet anno_json correspond to image files?

[zhangqijier]

I am currently working on converting the MFNet annotations into COCO format and noticed that in the annotation files under anno_json, the "filename" field (e.g., "filename": "..") does not directly match the image names in the images directory.

Could you please clarify how the "filename" field in anno_json corresponds to the actual image files in the images folder?