applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning. A threshold of 80% is a good starting point for a reasonable tone.
Threshold ranges from 0 to QuantumRange and is a measure of the extent of the sepia toning. A value lower than 1 is treated as a percentage.
See Implementation
applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning. A threshold of 80% is a good starting point for a reasonable tone.