Dataset problem in fastai V1

Part 1 (2019)
1

Hello everyone, My image is very large, so I give coordinates to represent a single picture. Each time I read out a picture based on the coordinates, does fastai ImageDataBunch support this operation?

2

got it

class PatchImageItemList(ImageList):
def open(self, fn:PathOrStr)->Image:
if not “#” in fn:
return super().open(fn)

    filename,coords=fn.split("#")
    
    coords=[int(c) for c in coords.split(":")]
    image=image_loader(filename,coords)
        
    return vision.Image(px=image)