Because colormaps are matrices, you can manipulate them like other arrays. The
brighten function takes advantage of this fact to increase or decrease the intensity of the colors. Plotting the values of the R, G, and B components of a colormap using
rgbplot illustrates the effects of
NTSC Color Encoding
The brightness component of television signals uses the NTSC color encoding scheme.
Using the nonlinear grayscale map,
effectively converts a color image to its NTSC black-and-white equivalent.
|Example - Mapping Surface Curvature to Color||Truecolor Surfaces|