Image processing

Details Image processing Image processing

2006-07-25

2006-07-25

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S592000, C345S594000, C345S597000, C345S590000

Reexamination Certificate

active

07081898

ABSTRACT:
Apparatus is provided to color-suppress a source frame that is composed of a plurality of pixels, each pixel being represented by three components defining a position within a color space. The source frame, comprising a foreground image against a background of a substantially uniform backing color, is provided to a processing means via an input means. A distance value is defined that for any, pixel describes how close its color is to a specified color, and the processing means calculates a transformation that maximises the distance value of a selected background pixel. Then, for each pixel, the processing means calculates a transparency value that is a function of the distance value of the corresponding transformed pixel. The transparency value is used to calculate how much of the backing color should be subtracted. The foreground image can then be composited with a replacement background using the same transparency values.

REFERENCES:
patent: 4589013 (1986-05-01), Vlahos et al.
patent: 5974172 (1999-10-01), Chen
patent: WO 00/21283 (2000-04-01), None
Search Report Under Section 17 dated Feb. 26, 2003, 1 page.

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