GRADATION ADJUSTMENT METHOD IN IMAGE PROCESSING UNIT

PROBLEM TO BE SOLVED: To simply adjust gradation with high accuracy in the image processing unit where a color gradation image is expressed by combinations of area gradation and density gradation with a level number less than the original gradation and of >=3. SOLUTION: Color patches are generate...

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Bibliographische Detailangaben
1. Verfasser:	ENOMOTO HIROMICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CINEMATOGRAPHY CORRECTION OF TYPOGRAPHICAL ERRORS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MAGNETOGRAPHY PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To simply adjust gradation with high accuracy in the image processing unit where a color gradation image is expressed by combinations of area gradation and density gradation with a level number less than the original gradation and of >=3. SOLUTION: Color patches are generated based on test sample input values which are spaced high and low values around a reference sample input value for each gradation level. Reference samples made based on the reference sample input value and test samples generated based on the test sample input values are compared. A test sample (image number) closest to a reference sample for each gradation level is inputted or a test sample (image numbers) closest to the reference sample as the entire gradation level is inputted and gradation is adjusted by gamma correction based on the input result.