Television – Special applications – Film – disc or card scanning
Patent
1996-07-08
1999-02-23
Faile, Andrew I.
Television
Special applications
Film, disc or card scanning
382167, H04N 336
Patent
active
058749888
ABSTRACT:
A system and methods for automated color correction. A computer-based workstation is coupled to an image source such as a telecine or other graphic image generating device, an image processing system such as a color corrector, and a utilization device such as a tape recorder or digital storage device. A target image from the image source is displayed on a display monitor associated with the workstation. An image and data storage device stores images and prestored reference image information for a plurality of selectable reference images. A capture device captures a source image from the image source. An image analyzer software process computes statistical parameters of the source image and compares these statistical parameters to prestored statistical parameters of a selected one of the reference images. The statistical parameters include a color distribution or frequency histogram for various color parameters, e.g. gain, gamma, and black level for video signals. A control unit provides correction value outputs to the image source or to the image processing system, to control the color parameters. The correction value outputs are utilized to control image parameters of the source image in an iterative manner until there is a match between prestored statistical parameters of the reference image and the determined statistical parameters of the target image.
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Da Vinci Systems, Inc.
Faile Andrew I.
House Ronald D.
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