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Comparing the differences in PDF files

Comparing files provides the ability to understand what has changed from one file to another.

With the PDFTron SDK, you can visually compare the differences between 2 files (images, paths, text, forms, shadings, and other types of content).

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Overlay
To provide a visual document comparison by overlaying and masking.

Pixel by pixel
To provide a visual document comparison by gathering each pixel to find the sum of absolute differences.

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