The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2007
Filed:
Feb. 19, 2004
Mark Julian Russell, Maidenhead, GB;
Ian Mclean, Woking, GB;
Mark Julian Russell, Maidenhead, GB;
Ian McLean, Woking, GB;
Sony United Kingdom Limited, Weybridge, GB;
Abstract
Digital image processing apparatus for applying pixel-based colour correction to a hue-saturation-based polar representation of pixels of an input image to generate an output image comprises colour correction logic arranged to provide a colour mapping operation defined by a hue alteration amount and a key value associated with each pixel; the colour correction logic comprising: hue modifying logic for adding a proportion of the hue alteration amount to the hue of each pixel of the input image, the proportion depending on the key value associated with that pixel; and saturation modifying logic for modifying the saturation of each pixel in dependence on the hue alteration amount and the key value for that pixel, such that for a key value indicating that only a fraction of the hue alteration amount should be applied to a current pixel, the saturation of that pixel is also modified so that, when expressed with respect to a rectangular chrominance-based colour space, the pixel is moved to a position in that colour space substantially lying on a straight line between the original pixel position and the position that the pixel would occupy if the full hue alteration amount were applied.