Quantel Limited

David Throup

David Charles Steele

An electronic graphic system,processes image data defining color values of a multiplicity of pixels that together form an image. The system,comprises a processing unit,in which image data from an image store,is processed with other image data from a store,The processing is effected on a pixel-by-pixel basis depending on control data in a control store,and on a predetermined gamma factor defining a relationship between color values and corresponding light values. The processing unit,thereby produces processed color value data representing a manipulated version of the image in which the light content of pixels has been varied by the other image data depending on the control data and the gamma factor.

Electronic graphic system

An image processing system 20 comprises a format converter 21 for receiving a first signal having a larger bandwidth and a second signal having a smaller bandwidth, the first and second signals together representing an image. A processor 23 is arranged to process the first and second signals to produce signals representing a manipulated version of the image. The system further comprises a deriving circuit 25 which is arranged to derive from information in the larger bandwidth signal additional information for the smaller bandwidth signal. The deriving circuit derives an unknown value of a pixel as represented by the smaller bandwidth signal from known values of the pixel and the pixels adjacent thereto as represented by the larger bandwidth signal and from known values of the adjacent pixels as represented by the smaller bandwidth signal. The deriving circuit facilitates conversion of the first and second signals into another signal format representing the image.

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Lockeridge, United Kingdom

David Throup