Resizing of photos

[dave7895]

What happens to non-square photos? Are they cut off at the sides where they are longer, are they resized without respect to aspect ratio or is it conserved by adding black/white bars?

[dancrew32]

Think this is the image augmentation part of the pipeline:
https://github.com/lucidrains/stylegan2-pytorch/blob/master/stylegan2_pytorch/stylegan2_pytorch.py#L132-L133

Should the resize take place before the center crop? This order seems like it might cause output distortion.

Anywho, it appears all images that are trained on are guaranteed to be squares of your --image_size command line argument.

[dave7895]

Thanks for the lines in the code. I think understand now what is happening. First the image is downscaled with the shorter side being as long as the --image_size flag, then the center is cropped, so the sides, where the picture is longer, are dropped. Am I correct or seeing this wrong?

[lukemelas]

Yes, that is correct.

[dave7895]

Ok. Thanks for the clarification.