Image matching using pixel-depth reduction before image...

Details Image matching using pixel-depth reduction before image... Image matching using pixel-depth reduction before image...

2007-09-25

2007-09-25

Mancuso, Joseph (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

C382S236000

Reexamination Certificate

active

10403754

ABSTRACT:
A block-matching method reduces pixel depth prior to match evaluation to drastically reduce the computations required intensive block-matching applications such motion estimation for video compression. Pixel-depth reduction is achieved by analyzing incorporating images to determine how to reduce pixel depth so as to retain information useful for block matching. Original pixel values (e.g., 8-bit), are compressed to lower-depth (e.g., e.g., 1-bit or 1.6-bit) pixel values. The resulting converted blocks are XORed to yield a comparison image. The 1s in the comparison image are tallied to provide a match measure. In the image analysis, the original images can be subsampled and averages can be computed based on the subsample pixels to reduce computational overhead.

REFERENCES:
patent: 5488618 (1996-01-01), Kondo et al.
patent: 6058210 (2000-05-01), de Queiroz et al.
patent: 6058217 (2000-05-01), Kondo
patent: 2002/0146073 (2002-10-01), Clark et al.

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