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I wrote a JPEG encoder once, and if I remember correctly you can change the quantization tables and the Huffman tables. My encoder just used the default tables
by Xcelerate 14y ago
I wrote a JPEG encoder once, and if I remember correctly you can change the quantization tables and the Huffman tables. My encoder just used the default tables in the standard, but it wouldn't surprise me to optimize these using a psychovisual fitness function.
- mistercow 14y agoYes, but the default tables in the standard do mimic the human eye's limitations. That's what increasing the quant factor on higher frequencies is.