JPEG image compression

Description

A demonstration of the JPEG image compression algorithm and its typical artifacts.

The AbsSubFilter calculates the absolute value of the pixel difference between its two input images. Three variants of the original image are used as inputs to the image difference calculation:

• the original image, encoded using the lossless PNG algorithm
• a JPEG image encoded with quality=75%
• a JPEG image encoded with quality=25%

(The JPEG images were created by the xv image processing program on Linux. The JPEG quality settings in other image processing programs may differ slightly.)

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