Appease the margin police at all costs

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Appease the margin police at all costs

✓ Published0🌍 Public

Last edited Apr 27, 2018

Created on Apr 27, 2018

This example shows a bash script that checks a PDF’s page margins by visually flagging any page that violates a precomputed “good” pixel sum threshold. The script uses `pdftk` to burst the PDF into individual pages, then overlays solid sky-blue rectangles with ImageMagick’s `composite` and `convert` commands to obscure the page body and edges. It then analyzes a histogram of each redacted page to count remaining white and sky-blue pixels, comparing the total against the expected value to identify offending pages. The process runs entirely from the command line, relying on `pdftk` and ImageMagick’s `convert`, `composite`, and `histogram:info:` features.

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