Robust temporal dithering and filtering

Details Robust temporal dithering and filtering Robust temporal dithering and filtering

2004-08-16

2009-06-02

Ahmed, Samir A. (Department: 2624)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S264000

Reexamination Certificate

active

07542620

ABSTRACT:
A temporal dithering manager uses temporal dithering to reduce contouring artifacts due to bit limiting. The temporal dithering manager truncates low order bits of an input signal, creates a temporal dither signal based on the truncated low order bits and applies the temporally created dither signal to the truncated signal. A temporal filtering manager applies a temporal filter to the truncated signal, thereby improving the quality of the truncated signal. The temporal dithering can be applied at a preprocessing stage, and the temporal filtering at a post-processing stage.

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