https://sudonull.com/perceptual-hash-search-for-similar-images
How perceptual hashing algorithms work: from simple averaging to DCT. Comparison of methods and practical application for developers.
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https://sudonull.com/jpeg-and-visual-neurophysiology-how-the-format-deceives-the-eye
Technical breakdown of JPEG through the prism of vision biology: YCbCr, chroma subsampling, DCT and quantization as implementation of CSF. For middle/senior developers.
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