This can produce artifacts such as moire patterns. Macrocell ¶īecause this filter needs to align the screen image to the pixel grid (the rasterization process) it may happen that not all the cells contain exactly the same shape (in terms of pixel values). The screen grid is the grid formed by the regular positioning of screen cells. In principle every cell contains the same shape, and the arrangement of the cells, in a regular and orthogonal grid, forms the screen. Screen Cell ¶Ī screen cell is the minimum rectangular area in the screen that contains a repeatable shape or image (commonly a dot, but can be a part of a line or other shape). Here we use the term to refer to the unbounded regular pattern formed by repeating some shape. Traditionally it was some kind of sheet with very small holes (a fabric for example) through which the light passed. It is also used for example when talking about screen printing. The term screen comes from the days when analog halftoning was invented. Each cell in this grid is formed by a single pixel. ![]() ![]() The pixel grid is the grid formed by the regular positioning of each pixel in the image. Following are some explanations of basic concepts used through this page. The screentone generator is based on traditional and digital halftoning principles. Using the Brightness and Contrast Options
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