How to crop multiple images by content?

Question

Image processing

There are hundreds of photographs of filed documents. You need to crop them according to the content so as to remove the non-uniform background (table) and the adjacent page. Prompt ready-made software to solve the problem.

Now the task is partially solved through the ImBatch software for batch processing. There is an Autocrop function by background color - the color and tolerance (threshold) are set with an eyedropper. The result often turns out to be so-so, either too little or too much is cut off (if a large threshold is set). You still have to crop most of the photos manually.
We need software that would dance not from the background, but from the opposite - it would determine the light quadrangle in the center of the photo and crop everything around.
In similar questions I see references to OpenCV, but I have no idea how to use it in practice (minimum programming experience). If there is no ready-made software, then how much can it cost to develop a solution using OpenCV?

Answer 1

In the latest versions of ImBatch, AutoCrop has the ability to Crop by Contours, perhaps it will do. I think this is where OpenCV is used.

Answer 2

People in such situations like to advise ImageMagik. I haven't tried it myself, but they say it's a very useful tool