Compositing in the presence of different transparencies

Details Compositing in the presence of different transparencies Compositing in the presence of different transparencies

2007-02-27

2007-02-27

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

Reexamination Certificate

active

11405949

ABSTRACT:
Methods and apparatus, including computer program products, for blending in the presence of different transparencies. In one aspect, the invention provides a computer implemented method for blending a first graphic element and a second graphic element in accordance with a transfer mode T, the first graphic element having a color A and an alpha a, the second graphic element having a color B and an alpha b. The method includes: calculating a resulting alpha as lerp(a, b, q), lerp being a linear interpolation function and q being a pseudo-opacity that varies between 1 and 0, inclusive; calculating a blended color as T(A, B, q); calculating an intermediate color as interpolate_color(A, blended color, min(b/resulting alpha, 1)), interpolate_color being a continuous function that interpolates its input colors and min being a function that selects the smaller of its input values; and calculating a result color as interpolate_color(B, intermediate color, min(a/resulting alpha, 1)).

REFERENCES:
patent: 5974198 (1999-10-01), Hamburg et al.
patent: 6028583 (2000-02-01), Hamburg
patent: 6185342 (2001-02-01), Hamburg et al.
patent: 6269196 (2001-07-01), Hamburg
patent: 6396959 (2002-05-01), Hamburg
patent: 6421460 (2002-07-01), Hamburg
patent: 6803923 (2004-10-01), Hamburg
patent: 6825852 (2004-11-01), Hamburg
patent: 2006/0001679 (2006-01-01), Hamburg

Affiliated with

Also associated with

Rating

Compositing in the presence of different transparencies does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compositing in the presence of different transparencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compositing in the presence of different transparencies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3832497