Editing of digital images, including (but not limited to) highlighting and shadowing of image areas

In a digital image having pixels pi (i=1, 2, . . . ) and a brightness B(pi) at each pixel pi, the global dynamic range of an image is changed by replacing the brightness B(pi) with the brightness B*(pi)=B(pi)x(B0/Bavg(pi))epsilon, where B0 and epsilon are predefined constants, and Bavg(pi) is some a...

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Bibliographische Detailangaben
1. Verfasser:	BEZRYADIN SERGEY N
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING APPARATUS SPECIALLY ADAPTED THEREFOR ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CALCULATING CINEMATOGRAPHY COMPUTING COUNTING CRYPTOGRAPHY DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY ELECTROGRAPHY HANDLING RECORD CARRIERS HOLOGRAPHY IMAGE DATA PROCESSING OR GENERATION, IN GENERAL MATERIALS THEREFOR ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS SEALS
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Beschreibung
Zusammenfassung:	In a digital image having pixels pi (i=1, 2, . . . ) and a brightness B(pi) at each pixel pi, the global dynamic range of an image is changed by replacing the brightness B(pi) with the brightness B*(pi)=B(pi)x(B0/Bavg(pi))epsilon, where B0 and epsilon are predefined constants, and Bavg(pi) is some average brightness value, e.g. the mean brightness over a region R(pi) containing the pixel pi. The local dynamic range is not changed significantly in some embodiments. The brightness of an image at a pixel can be defined so that multiplication of the brightness by a positive value k corresponds to multiplication of tristimulus values by k. In some embodiments, a color coordinate system is used with the brightness being one of the coordinates.