2.7. LCh Components Layer Modes

The LCh group contains layer modes that make use of the LCh color model. LCh stands for Lightness, Chroma, Hue. It is mathematically derived from the CIELAB reference color space. See also CIELCh.

LCh Hue

شكل 8.41. Example for layer mode LCh Hue

Example for layer mode “LCh Hue”

Top layer at 100% opacity using LCh Hue mode.


LCh Hue mode corresponds to HSV Hue but is based on different mathematical formulas.

LCh Chroma

شكل 8.42. Example for layer mode LCh Chroma

Example for layer mode “LCh Chroma”

Top layer at 100% opacity using LCh Chroma mode.


LCh Chroma mode corresponds to HSV Saturation but is based on different mathematical formulas.

LCh Color

شكل 8.43. Example for layer mode LCh Color

Example for layer mode “LCh Color”

Top layer at 100% opacity using LCh Color mode.


LCh Color mode is a combination of LCh Chroma and LCh Hue, and corresponds to HSV Color, but is based on different mathematical formulas. See A tutorial on GIMP's very awesome LCH Blend Modes for information on using this layer mode.

LCh Lightness

شكل 8.44. Example for layer mode LCh Lightness

Example for layer mode “LCh Lightness”

Top layer at 100% opacity using LCh Lightness mode.


LCh Lightness mode corresponds to HSV Value, but is based on different mathematical formulas. See A tutorial on GIMP's very awesome LCH Blend Modes for information on using this layer mode.

Luminance

شكل 8.45. Example for layer mode Luminance

Example for layer mode “Luminance”

Top layer at 100% opacity using Luminance mode.


Luminance mode is similar to CIE luminance, but does not alter saturation. It divides the upper layer luminance by the lower layer luminance; then uses that result to multiply with the lower layer component.