mmm… we want the images in our server as we have no control of other sites where images can be lost.
I have assumed we are not going to be able to completly disable image processing.
We are glad just if the the system don’t touch images that comply to limits (1.2 MB in file size and 2048 pixels in large side) and if we can tweak a bit the recompression for that images that exceed limits.
I think I could managed to get first goal: just I have stablished limit in file size to 1230 KB and the threshold in image composer to the same size in bytes.
Now it seems that images with less than that size are not recompressed (as it worked some versions ago, it seems image composer has been introduced recently).
But when you try to upload an image say 2100 pixels and 3 MB you get weird results.
It is resized to something like 900 pixels and 200 KB other times 1024 and 500 KB…
The image loses its detail completly and the color grading.
I have configured image compoler limits to 1920 pixels and jpeg compression quality to 90, so I would have expected it to recompress to that size (I have tested with images that can be compressed with 90 quality and 1920 pixels easily within the 1.2 MB limit).
But systems keeps compressing it far too much.