Media autoscale threshold change picture's colors

[fernandot]

When uploading a picture, the automatic autoscale threshold (2560) changes the picture's colors to a different color profile (fewer colors, less vivid)

I've deactivated the automatic autoscale with

add_filter('big_image_size_threshold', '__return_false');

and the issue disappears

This is a big problem for photography-related blogs or websites, where photo quality makes the difference.

It's ok to scale the images for better performance, but we should be able to avoid it without loss of quality.

Note: I've tried to remove the jpg quality loss applied by WordPress and that's not the problem, the problem comes with the autoscale.

(Attached: image file without autoscale, image file with autoscale)

[fernandot]

Image file without WP auto scale

[fernandot]

Image file after WP auto scale

[fanvid]

Im having a similar issue, new image uploads, every 2 or 3 images in 10 will come out corrupted after going through wordpress...