[Bug] ann2img function missing

[txytju]

https://github.com/Hwang64/PSIS/blob/master/extract_annotation_pair.py#L37 in this line, function ann2img is not defined nor imported.

[JimKimHome]

Hello,have you got the masks from extract_mask.m. How do you manage to use cocoapi in matlab? @txytju

[txytju]

Hello,have you got the masks from extract_mask.m. How do you manage to use cocoapi in matlab? @txytju

sorry, I didn't try this method afterwords