How is composed a grayscale image?
Grayscale image Mandrill (512 512 pixels)
Zoom of a 50 50 pixel bloc
Zoom for visualizing the luminance levels (256 possible levels)
Color image Mandrill (512 512)
How is composed a color image?
50 50 bloc
The RGB Planes
On a screen, the color is based on additive synthesis of the three components: RED - GREEN - BLUE
Note : printing for full color documents by subtractive synthesis, (components : Yellow, Cyan, Magenta + Black).