Importance

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Abstract

An image processing system for extracting and treating a digitized color subject image for seamless compositing against an arbitrary background includes the generation of a final control image from the image of a subject in front of a screen consisting of a range of colors. A sample of the background screen is captured and analyzed using filter kernels to determine a range of red, green and blue values which are stored in separate histograms. A first control image is generated by comparing mean histogram data with the subject image. A final control image is generated by dividing the first control image into separate background, foreground and fringe regions. A treated subject image is generated by leaking color from the local background region into the fringe regions of the subject image using filter kernels. The treated image is suitable for compositing against an arbitrary background image. The composite image may be touched up by using a software brush which on each pass of the brush expands the background region by eliminating immediately adjacent fringe pixels, causes other nearby fringe pixels to increase in translucence, and allows the boundary of the fringe region to encroach on the foreground region. Simultaneously, the brush may also cause fringe pixels to absorb some of the color of neighboring foreground pixels.

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First Claim