Image analysis – Image compression or coding – Transform coding
Patent
1995-03-17
1997-06-24
Mancuso, Joseph
Image analysis
Image compression or coding
Transform coding
358433, 364725, G06K 936
Patent
active
056424388
ABSTRACT:
A method and apparatus for the realization of two-dimensional discrete cosine transform (DCT) for an 8*8 image fragment with three levels of approximation of DCT coefficients. A first embodiment uses two multiplications for a pixel. A second embodiment does not use multiplications. The accuracy of approximation of DCT coefficients in the second embodiment is coordinated with distortion defined by a given quantization matrix. The Discrete Algebraic Transform (DAT) is presented. The DAT is a good approximation of the DCT and can be used in any combination with DCT.
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Alaris Inc.
G.T. Technology, Inc.
Mancuso Joseph
Patel Jayanti K.
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