Specifications

Print2CAD OCR 2013 - 110
17.4 Color Type
17.4.1 Grayscale Color Space
“In photography and computing, a grayscale or grayscale digital image is an image in
which the value of each pixel is a single sample, that is, it carries only intensity infor-
mation. Images of this sort, also known as black-and-white, are composed exclusively
of shades of gray, varying from black at the weakest intensity to white at the strongest.
Grayscale images are distinct from one-bit black-and-white images, which in the context of
computer imaging are images with only the two colors, black, and white (also called bilevel
or binary images). Grayscale images have many shades of gray in between. Grayscale
images are also called monochromatic, denoting the absence of any chromatic variation.
Grayscale images are often the result of measuring the intensity of light at each pixel
in a single band of the electromagnetic spectrum (e.g. infrared, visible light, ultraviolet,
etc.), and in such cases they are monochromatic proper when only a given frequency is
captured. But also they can be synthesized from a full color image; see the section about
converting to grayscale.
R = G = B (additive mixture); see gray scale table
C = M = Y (subtractive mixture)”
Source: Wikipedia, subject “Grayscale Color Space”
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