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An example of a continuous-tone device is a CRT computer screen. Here, any pixel can represent any color, because the color components of the pixel are analog and can vary in infinite steps, and hence do not need halftones to make the colors. Of course, because the computer is a digital device, it
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cannot provide the CRT with infinite tone variations. In 24-bit color mode, it provides the monitor with 256 discrete steps for each channel (red, green, and blue), for a total of 16,777,216 (256) discrete colors. A purely analog
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A halftone device, in contrast, uses discrete dots of color, which at a certain distance look closely like the intended color. Examples of this are
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even shorter) is one where each color at any point in the image is reproduced as a single tone, and not as discrete
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printers. Magazines and most printed material also use this technique to create the colors.
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The most common continuous tone images are film photographs (digital
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prints, or a combination of halftones for color prints.
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170:Therefore, film is a halftone medium.
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