Image processing apparatus

Details Image processing apparatus Image processing apparatus

1996-10-24

2000-05-16

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Image filter

382261, 382266, 348400, 348407, G06K 940

Patent

active

060647760

ABSTRACT:
An image processing apparatus includes a flat domain decision unit that causes a segmentation unit to divide the decoded picture signal from a decoder into a plurality of small regions (blocks) and then causes a picture quality decision unit to decide whether or not the regions are flat domains region by region, an AC component prediction unit that predicts the AC component from the decoded picture signal, and a switch that outputs the AC component signal predicted by the AC component prediction unit for the blocks determined by the flat domain decision unit to be flat domains and also outputs the decoded picture signal as it is for the remaining blocks.

REFERENCES:
patent: 4827338 (1989-05-01), Gerard
patent: 5146326 (1992-09-01), Hasegawa
patent: 5229864 (1993-07-01), Moronaga et al.
Chung-Nan Tien, et al., SPIE Visual Communications and Image Processing, vol. 2094, No. Part 3, pp. 1627-1638, "Transform-Domain Postprocessing of DCT-Coded Images", Nov. 8, 1993.

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