Simulated color imaging using only two different colorants/toner

Details Simulated color imaging using only two different colorants/toner Simulated color imaging using only two different colorants/toner

1988-11-28

1990-02-20

Evans, Arthur G.

Recorders

Electric recording

Electrochemical

358298, G01D 1500

Patent

active

049030485

ABSTRACT:
Simulated color imaging using gray level patterns produced from two differently colored materials by employing fine patterns of dots. The dots blend with the background and yield a gray or colored appearance when seen from a distance. The imaging process utilizes ink pattern designs in conjunction with registered two-color imaging to thereby form simulated color images. Digital information representing two sets of gray-level producing patterns, set A for color A and set B for color B, is electronically stored in computer memory. The patterns in set B are complementary to those of set A. An apparent or simulated color image is produced by overlaying, combining or juxtapositioning a pattern from set A with a complementary pattern from set B, the combined image being subsequently rendered visible using two different colorants. A gray level pattern is produced for each elemental area of an original image.

REFERENCES:
patent: 4078929 (1978-03-01), Gundlach
patent: 4554241 (1985-11-01), Edwards
patent: 4809063 (1983-02-01), Moriguchi et al.

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