Reports and papers are full of pictures you may need separately: a chart for a presentation, a photograph for a website, a diagram for a lesson. Screenshotting them loses quality and wastes time. This tool pulls the embedded images out of your PDF at their original resolution and hands them back as individual files.
They come out as they were stored inside the PDF, which is normally better than a screenshot.
It extracts embedded pictures. Charts drawn as vector graphics are part of the page rather than separate images.
Some documents contain only text and vector drawings, in which case there are no embedded images to extract.
Extraction is technical, not legal. Copyright still applies to whatever you take out.