[Zubersoft]

The image correction software is utilizing third party software that does the heavy lifting for correcting images. Among other things, it applies a color filter (so a grayscale page is produced instead of color), and grayscale images use less data than a colored image, which is why your file is smaller after using the image correction. As far as "darkening" the image, if you are hoping to enhance the clarity of the page by darkening text/lines/notes, etc, there isn't an option in the third party software to do that. That's going to require some custom image processing. I have researched this a little as another user asked for this, but it will involve having to use the OpenCV library to apply various algorithms to the image. It's not a trivial effort unfortunately, but it's on my list of things to do once time allows.

Mike