I am trying to analyze images using IDL, and I need to create an ROI. Specifically, I have hundreds of images, each containing 6 bands. Two of the bands contain the longitude and latitude information of each image. I want to create an ROI using set thresholds on latitude band. ENVI has a tool for creating ROIs using band thresholds but I don't have license for it. Is it possible to do it using IDL?
Thank you!