Repository files navigation ⚠️ 🚧 In development and very experimental 🚧⚠️
write the todo list
get actions to use gcc-12+
look at task lists
switch to cmake / something modern?
Consider plain C interface
Write public API first
Investigate variable quantization by edge/centre distance or mask
Adjust jpeg luminosity and/or chroma levels without re-compressing and losing quality.
Operates within YCbCr colour space by directly adjusting the JPEG DCT blocks.
Does not need to make lossy requantisation or YCbCr ➤ RGB ➤ YCbCr conversion.
Allows adjustments to brightness/contrast without affecting colour
Allows adjustments to colour intensity
Allows shifting Cb, Cr to ajust colour balance
Analyses all YCbCr values to produce histograms and stats
Calculates ranges of Y, Cb, Cr changes that remain within RGB colourspace
Or allows changes that just push a specified number/percentage of pixels outside RGB colourspace
Uses the libjpeg-turbo library C++ API TurboJPEG
Written in C++ for GCC with -std=gnu++20
Uses standard autotools
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Adjust jpeg levels without re-compressing
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