Unexpected outcome of the SaveImage transform

[hblanco2009]

After loading and resizing a PNG image, the SaveImage transform doesn't work as expected. To the right you can see the original image (4280 x 3520 pixels). Below you can see the resized image (256 x 256) but clearly not well encoded. Any hints on what is going on?

[wyli]

thanks for reporting, could you please try channel_dim=None or channel_dim=-1 for EnsureChannelFirst, because the input png may be channel last.

[hblanco2009]

Nope, I tried several combinations: channel_dim: {'None', 'no_channel'}, dtype: {np.uint8, np.uint16, np.uint32}, but still the resized image is not well encoded.

[wyli]

thanks, if you could share one png example, I can look into this further

[hblanco2009]

This is the link: https://drive.google.com/file/d/1jc3l85WY4NY5vKp3RA_A1dLoMYVT99nw/view?usp=sharing
Let me know if you could download the image.

[wyli]

yes, it's output_dtype=np.uint16 in SaveImage, it works fine. sorry the dtype was an incorrect arg

[hblanco2009]

Yes!, it works very good! Thank you. Cheers.