Created attachment 147774 [details] Image before upload 1085x1597 pixels 24bit 430.47 KB, image/jpeg It seems that koha may increase image file size upon upload while reducing pixel size. In the attached examples, koha manages to increase image file size by 119% (430KB to 940KB) while reducing image size to 30,6% of the original, both in 24bit colour, therefore needlessly increasing database size.
Created attachment 147775 [details] koha processed image 600x883 pixels 24bit 940.43 KB, image/png