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Halftone" can also be used to refer specifically to the image that is produced by this process. [ 1 ] Where continuous-tone imagery contains an infinite range of colors or greys , the halftone process reduces visual reproductions to an image that is printed with only one color of ink, in dots of differing size ( pulse-width modulation ) or ...
A duotone image, made using black and blue in Photoshop. Duotone (sometimes also known as Duplex) is a halftone reproduction of an image using the superimposition of one contrasting color halftone over another color halftone. [1] This is most often used to bring out middle tones and highlights of an image.
A continuous-tone image is one in which each color at any point in the image can transition smoothly between shades, rather than being represented by discrete elements such as halftones or pixels. [1] Many printing methods use discrete halftone dots of cyan, magenta, yellow, and black .
When an image has a transition from light to dark, the error-diffusion algorithm tends to make the next generated pixel be black. Dark-to-light transitions tend to result in the next generated pixel being white. This causes an edge-enhancement effect at the expense of gray-level reproduction accuracy.
When you make a plate with stochastic screening you must use a tone correction curve, this curve allows one to align the tone reproduction of an FM screen to that of an industry standard. Given the same final presswork tone value, an FM screen utilizes more halftone dots than an AM/XM screen.
A line consists of halftones that is built up by physical ink dots made by the printer device to create different tones. Specifically LPI is a measure of how close together the lines in a halftone grid are. The quality of printer device or screen determines how high the LPI will be. High LPI indicates greater detail and sharpness. [1]