void _Frame::rawToRGBColorMatrix(int kelvin, float *matrix) const {
// Linear interpolation with inverse color temperature
float alpha = (1./kelvin-1./3200)/(1./7000-1./3200);
colorMatrixInterpolate(rawToRGB3200K,
rawToRGB7000K,
alpha, matrix);
}
void Platform::rawToRGBColorMatrix(int kelvin, float *matrix) const {
// These are quick and dirty numbers computed using a random
// outdoor overcast day, and interior office lighting. The 3x3
// linear portion of the matrices are scaled so that the minimum
// row sum is one (i.e. saturated in all channels maps to white).
static float RawToRGBColorMatrix3200K[] = {
1.6697, -0.2693, -0.4004, -42.4346,
-0.3576, 1.0615, 1.5949, -37.1158,
-0.2175, -1.8751, 6.9640, -26.6970
};
static float RawToRGBColorMatrix7000K[] = {
2.2997, -0.4478, 0.1706, -39.0923,
-0.3826, 1.5906, -0.2080, -25.4311,
-0.0888, -0.7344, 2.2832, -20.0826
};
// Linear interpolation with inverse color temperature
float alpha = (1./kelvin-1./3200)/(1./7000-1./3200);
colorMatrixInterpolate(RawToRGBColorMatrix3200K,
RawToRGBColorMatrix7000K,
alpha, matrix);
}