Image analysis – Color image processing – Compression of color images
Reexamination Certificate
2006-04-25
2006-04-25
Johns, Andrew W. (Department: 2621)
Image analysis
Color image processing
Compression of color images
C345S600000
Reexamination Certificate
active
07035458
ABSTRACT:
A method for facilitating transmission of video data over a computer network is disclosed. The method comprises the following exemplary steps. First, all the distinct colors in a region are identified. Second, the n most frequently occurring distinct colors are selected, where n is an integer parameter which is less than or equal to sixteen (16). Then, the next 16−n distinct colors are selected from the remaining distinct colors. These next 16−n distinct colors are colors that differ the most from the n selected distinct colors. The sixteen (16) selected distinct colors collectively represent a color map for the region. For each pixel within the region, one of the sixteen (16) selected distinct colors is assigned to that pixel, i.e., each pixel is represented by a 4-bit color. The assignment is based on which one of the sixteen (16) selected distinct colors is closest to the original color of the pixel. Once all the pixels in the region have been assigned their respective distinct colors, the region is now represented by a 4-bit bitmap. The color map and the 4-bit bitmap can then be compressed by a PNG compression algorithm for transmission to the intended destination(s).
REFERENCES:
patent: 5867112 (1999-02-01), Kost
patent: 6189045 (2001-02-01), O'Shea et al.
patent: 2001/0032238 (2001-10-01), Cronin et al.
patent: 2002/0051181 (2002-05-01), Nishimura
patent: 2002/0159632 (2002-10-01), Chui et al.
patent: 2003/0007695 (2003-01-01), Bossut et al.
Alavi Amir
Carr & Ferrell LLP
Johns Andrew W.
Pixion, Inc.
LandOfFree
Method and system for facilitating transmission of video... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for facilitating transmission of video..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for facilitating transmission of video... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3590782