Sorry If this thread is posted before,but I couldn't find it.
I have converted many pdf's and in most of them the images converted are in black and white as attached below link can show.
How to convert these pdf which I made MYSELF and added many images with format .jpg but I want it to convert into .mobi format so I and many more students can view that book with proper images.
https://imgur.com/a/kOsPUaz