Color encoding-decoding method
OwnerJames A. Grashaminventor
Life of this patent
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Abstract
A method of using colors to encode and decode graphic material such as writing or a photograph. Colored graphic material and a two colored pattern are superimposed. Colors mix subtractively to form a multicolored image. This image is photographed in terms of light and dark to form an encoded graphic. Because of the colors used in encoding, the encoded graphic is a mixture of positive and negative portions of the original material. Decoding is accomplished by superimposing another colored pattern, similar to the first pattern, and an appropriately colored form of encoded graphic. A subtractive color mixture of colors in the superimposed pattern and encoded graphic forms an image that to the eye is a reconstruction of the original graphic material.
Claims22
A method of encoding and decoding graphic material having first and second colors, said method comprising the steps:
- forming a graphic having first and second colors, said first and second graphic colors being located in first areas of said graphic to correspond to, respectively, said first and second material colors, said first and second graphic colors being located in second areas of said graphic to correspond to, respectively, said second and first material colors, said graphic constituting an encoded form of said material;
- superimposing a first pattern of first and second colors and said graphic, said first and second first-pattern colors located to coincide during superimposition with, respectively, said first and second graphic areas, said first-pattern colors mixing with the graphic colors they overlie to form a multicolored image that is a reconstruction of said material.
A method of encoding and decoding colored graphic material comprising the steps:
- forming a graphic having first and second areas, said first and second areas having, respectively, positive and negative images of corresponding portions of said graphic;
- combining a first pattern of first and second colors and said graphic, said first and second first-pattern colors located to coincide, respectively, with said first and second graphic areas, an interaction of said first-pattern colors and the graphic colors forming a reconstruction of said graphic material.
Dependencies are inferred from the claim text.