The class ImageExtract provides a tool for extracting an image in a specified sub-area and band.
Description:
The class launches a new Im2Learn window with extracted sub-image.
First, select a sub-region in the main panel, and press "Extract" button to launch the sub-image.
For full image extraction (duplication of the image or band extraction), press "set entire image"
to set the entire image region before extracting sub-area.