Say I have this kind of image:
You can see the black areas are separated by transparent pixels. If I want to extract these into new images, I could select the area, copy, create new image from clipboard. That works, but is pretty slow when I have 50 areas on the image. Not to mention, error prone due to snappy selection.
Is there a way to do this easily in GIMP or any other editor? Is there a technical term for this image processing?