I’ve selected the healthy and diseased parts of the leaf, but when I pass the leaf through the conveyor it doesn’t grab an image of it. Why?
This is usually because one of the guide bars on the conveyor is showing on the camera image. As such, WinDIAS thinks that this is part of the leaf and will not grab the image until it sees the guide bar end (which it never does). Please move any guide-bars out of the camera image by moving them up or down and then try again.