kampidh / colour-gamut-plotter Goto Github PK
View Code? Open in Web Editor NEWA GUI for Colour-Science CIE chromaticity scatter diagram from image
License: GNU General Public License v3.0
A GUI for Colour-Science CIE chromaticity scatter diagram from image
License: GNU General Public License v3.0
Whenever plotting a large image size with large plotting density, the calculation can take quite a bit of time. Thus hang the whole app until the calculation is finished.
Currently, matplotlib pyplot is not thread safe, so it can't be implemented with multithreading.
Need a better solution to wait the plotting to complete without hanging the whole app.
There are TRC tags from ICC profiles, however Pillow is currently unable to extract those data.
I'll find out if I can extract it from the raw byte data.
There are 2 different standards to be used:
ICC v2
Have TRC with a curve data values. Can be interpolated per channel single dimensionally with scipy. or
Have TRC with a gamma value (ICC spec, curveType count value = 1)
ICC v4
Have TRC with a curve function as described in ICC v4 specification (page 71). Should be easily parsed to transfer functions.
Extra notes:
Embedded ICC profiles also have primaries coordinate and white point / illuminant that can be accessed with Pillow. I have yet to find out if colour-science can make a 'synthetic' profile from those parameters, that can be displayed later on the colour plot.
If all of the points above are possible, it will improve the accuracy of the plot significantly. And I don't have to rely on string parsing for the automatic profile detection.
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