Image analysis – Image compression or coding – Substantial processing of image in compressed form
Patent
1995-06-07
1998-09-01
Mancuso, Joseph
Image analysis
Image compression or coding
Substantial processing of image in compressed form
348578, 382166, 382250, G06K 936, G06K 946
Patent
active
058022104
ABSTRACT:
An image processing system conducts a video effect processing. In the mosaic-image-processing, a dc component of inversely quantized discrete cosine transform (DCT) coefficients is multiplied by a constant h other than zero and an ac component of the inversely quantized DCT coefficients is replaced with zero. In the case of monochromatic-image-processing, a dc component D.sub.y of a luminance block Y of the inversely quantized DCT coefficients is multiplied by a constant i other than zero and an ac component A.sub.y of the luminance block Y is multiplied by a constant I other than zero, dc components D.sub.Cb and D.sub.Cr of chrominance blocks Cb and Cr of the inversely quantized DCT coefficients are replaced with constants j and k, respectively, and ac components A.sub.Cb and A.sub.Cr of the chrominance blocks Cb and Cr are replaced with constants J and K, respectively. In the thermographic-image processing, a dc component D.sub.y of the luminance block Y is processed into dc components D.sub.Cb '=mD.sub.y +n and D.sub.Cr '=pD.sub.y +q where m, n, p and q are a constant, respectively, ac component A.sub.y of the luminance block Y is processed into ac components A.sub.Cb '=MA.sub.y +N and A.sub.Cr '=PA.sub.y +Q where M, N, P and Q are a constant, respectively, and the dc component D.sub.y and the ac component A.sub.y are replaced with constants s and S, respectively.
REFERENCES:
Patent Abstracts of Japan, vol. 18, No. 69 (E-1502), Feb. 4, 1994, JP-A-05 284 361, Oct. 29, 1993.
Patent Abstracts of Japan, vol. 17, No. 575 (E-1449), Oct. 20, 1993, JP-A-05 167 920, Jul. 2, 1993.
Itaya Yusei
Kurata Masanori
Murakami Ryusuke
Johnson Timothy M.
Kabushiki Kaisha Toshiba
Mancuso Joseph
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