[ Version ( since = "1.20" ) ]
public double decode (double val)
Convert val to its gamma decoded value.
This is the inverse operation of color_transfer_encode.
For a non-linear value L' in the range [0..1], conversion to the linear L is in general performed with a power function like:
L = L' ^ gammaDepending on func, different formulas might be applied. Some formulas encode a linear segment in the lower range.
| val |
a value |
| func |
|
the gamma decoded value of |