Conversions between standard color spaces
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United States of America Patent
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Jul 6, 2004
Grant Date -
N/A
app pub date -
Oct 29, 1999
filing date -
Oct 29, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclose are various methods for optimising conversions between color spaces (FIG. 1). A set of atomic mathematical ((a)-(f)) functions are identified which, when performed in sequence, implement the conversions. Specific (first) sequences of the mathematical functions are then identified which when preformed convert colors between particular color spaces. A set of computational operations ((g)-(i)) are then established for evaluation using a computing device, the operations, when performed in (second) sequences cause the color conversions. A particular one of the first sequences required for converting from a first color space to a second color space is then identified and transformed into a (third) sequence of computational operations chosen from the computational operations ((g)-(i)) having substantially the same transformation effect as the particular sequence. Also disclosed is a method of sequentially combining a first color conversion list (FIG. 2A) with a second color conversion list (FIG. 2B) to form a single output conversion list (FIG. 2C) having a corresponding conversion function, each conversion list traversing a chain of color spaces comprising at least a corresponding source color space and a corresponding terminal color space. Also disclosed is a method of determining a processing gamut for intermediate color spaces (304, 306) traversed in a color conversion chain (300) from a source color space (302) to a target color space (308).
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Patent Owner(s)
| Patent Owner | Address | |
|---|---|---|
| CANON KABUSHIKI KAISHA | TOKYO |
International Classification(s)
Inventor(s)
| Inventor Name | Address | # of filed Patents | Total Citations |
|---|---|---|---|
| Roberts, Peter Malcolm | Birchgrove, AU | 3 | 41 |
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|---|
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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