The greyscale images consist of 256 grey tones of colors. The main feature of the greyscale image is the equal distribution of colors red, green and blue. It carries only intensity information of individual pixels as a single sample and is composed of a wide range of shades. It is also called monochrome image. The contrast ranges from black to white, black is taken as weakest intensity and white as the strongest intensity value. It is an 8-bit image which constitutes 256 shades.
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