Modifying JPEG Quantization Tables
If you know how JPEG works, then you know that JPEG files contain quantization tables, which are a table of values that the DCT (Discrete Cosine Transform) coefficients of a certain block of an uncompressed image file are divided by and rounded to the nearest integer. These tables contain values determined by software such as Photoshop, which sets the quality of the compressed image. Higher values in the quantization table result in more aggressive compression, leading to lower image quality, wh...
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12th June 2024, 12:09 BST