A client sends a PDF with product photos you need separately. A report has charts and graphs you want to reuse. A brochure has high-res images embedded in the document. Instead of taking screenshots (which lose quality), extraction pulls the original embedded images at full resolution.
Images are extracted at their original embedded resolution — not at screen quality. A 300 DPI photo embedded in a PDF comes out as a 300 DPI photo. This is significantly better than screenshotting the PDF page.
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