Artifact reduction for large dynamic range input data in JPEG co

Details Artifact reduction for large dynamic range input data in JPEG co Artifact reduction for large dynamic range input data in JPEG co

1996-11-21

1998-05-26

Rogers, Scott

Image analysis

Image compression or coding

Quantization

382275, 358429, 358455, 358463, G06T 500, G06K 938, H04N 1407

Patent

active

057579750

ABSTRACT:
A method of correcting out-of-range 8-bit pixel values, which should range from 0 to 255 by successively finding an out-of-range pixel, correcting it by adding (subtracting) an amount to restore that value to 0 (255), and then subtracting (adding) an equal amount to an adjacent pixel or pixels. An alternative, most useful for text, is to find an out-of-range pixel, and then replace it, and all adjacent pixels that are within a predetermined limit of 0 (255), with 0 (255).

REFERENCES:
patent: 5224178 (1993-06-01), Madden et al.
patent: 5278667 (1994-01-01), Takahashi
patent: 5339368 (1994-08-01), Higgins-Luthman et al.
patent: 5359676 (1994-10-01), Fan
patent: 5379122 (1995-01-01), Eschbach
patent: 5521718 (1996-05-01), Eschbach
patent: 5589950 (1996-12-01), Fujimoto et al.

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