An alternative to conventional halftone screening that creates tonal graduations by placing same-size microdots (typically 12 to 30 microns) in a computer-controlled, random order within a given area. The computer uses frequency modulation to vary the number and placement of same-sized dots. The random dot pattern eliminates many moiré problems and allows more than four colors to represent the tones in an image.
A form of electronic dot generation performed by screening algorithms. Frequency modulated or FM screening produces almost continuous tone images with very small dots of equal size and variable spacing.
A silkscreening process that conveys the tone of a screened image by varying the number and location of dots rather than just varying the size of the dots within the grid.