I would like to know how can I resize an image to a specific filesize in jpg format? I work with some scanned images and I usually crop required part of those images and I save them as jpg. But I also need to resize those saved jpg files to a certain filesize say, 30 KB or less. Usually I go through the long procedure of resizing down the final image and save it, and check the filesize in explorer. But sometimes I have to repeat resizing the image over and over till it shows 30 KB or less in explorer. And sometimes certain images are really hard to read at such filesizes but unfortunately its a requirement for a system. I know PNG files maintain better quality but I need them only as jpg.
So please help me on this and also is this possible without much compromise on image quality?