Recorders – Electric recording – Electrochemical
Patent
1986-10-15
1988-06-14
Evans, Arthur G.
Recorders
Electric recording
Electrochemical
358 80, G01D 1500
Patent
active
047515350
ABSTRACT:
A technique is disclosed for matching a color, applicable for example to printing a color which matches a color on a CRT display. Quantities of toners which will generate the matching color are determined and then a pattern of toners which will approximate those quantities is applied. To determine the quantities, a definition of the original color, such as its RGB coordinates, is converted to coordinates in a linear mixing space, such as CIE coordinates. These coordinates, together with coordinates of the toners are then used to calculate quantities of toners which will produce a matching color. The calculations match hue, saturation and reflectance so that the matching color appears like the original color and so that characteristics of an original image are preserved. A table containing the area coverages of available toner patterns is used in selecting the toner pattern. A separate pattern for each toner may be selected by comparing the quantity of that toner with the area coverages of its available patterns to find the separate toner pattern which will come closest to that quantity. The selected separate patterns of the toners are then combined to obtain a combined toner pattern, which is then applied.
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Evans Arthur G.
Xerox Corporation
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