Excuse me, Can you answer me some questions about "--load_size" and "--old_size", please ?

[little-misfit]

I have some question about "--load_size" and "--old_size" which are in the "base_options.py":

parser.add_argument('--old_size', type=int, default=(256,256), help='Scale images to this size. The final image will be cropped to --
crop_size.')
parser.add_argument('--load_size', type=int, default=1024, help='Scale images to this size. The final image will be cropped to --
crop_size.')

What's the difference between the two? What do they mean？At first，I think the “--load_size" is used to reize the input_image. Because I have found the "--load_size" in "base_dataset.py"

if isinstance(opt.load_size, int):
self.load_size = (opt.load_size, opt.load_size)
P1_img = F.resize(P1_img, self.load_size)
P2_img = F.resize(P2_img, self.load_size)

But the input_image's size should be 256256, not the load_size =10241024. So i feel confused. Could you please answer my question？And tell me the correct meaning of ”--load_size" and "--old_size" ?
Thanks for your reading, best wishes