Basic Screening

Screening (or halftoning) is the process of drawing and color reproduction in printing. To complete this process, image or color should be broken up into patterns of dots called halftone screens (halftone screen). Simple application of this technique is approaching the level of gray with a pattern of black dots on a white background. Color shades can be approached if the pattern of four-point-color cyan, magenta, yellow, and black are used.

The points are applied in a proper arrangement and proportion. When you register, cyan, magenta, yellow, and black dots will form a rose pattern which is a "blend" together to give a great impression with a number of different colors.

Halftone dot-produced by the rasterization process of photographing the original image through a screen which is
The main function of raster image processors such as RIP HQ. Light reflected from the image creates a point in every hole in the screen. The size of dots on each particular point is proportional to the amount of light coming through the screen, the number of lines per inch that make up the screen determine the fineness of the point.

Each square in the grid called halftone cells, each halftone cell containing the point, which increases as the intensity of colors, which enhance the image of the picture. A point can take anywhere from 0 to 100 percent of the halftone.

In a black-and-white image, for example, points 0-percent white areas of the picture, the point is 100 percent black areas, and intermediate points dariukuran create the impression of gray area. Color images of work in the same way, except that three or four grid superimposed over the image in various angles. Each grid contains one color (cyan, magenta, yellow, or black, for example)
and called the film separation (separation film).