Image analysis – Image compression or coding – Predictive coding
Patent
1996-06-21
2000-05-09
Lee, Thomas D.
Image analysis
Image compression or coding
Predictive coding
382239, 382240, 348411, G06K 936, H04N 712
Patent
active
060614749
ABSTRACT:
An encoding error by the encoding and the decoding of an image is controlled within a predetermined range by an image processing apparatus which includes an input unit for inputting image data, a prediction unit for predicting pixel values indicated by the image data, a generation unit for generating pixel values derived by converting the pixel values of the image data within a range of .+-.e based on the prediction result by said prediction unit and an encoding unit for encoding parameters relating to the pixel values generated by said generation unit based on the prediction result by said prediction unit. An image having a gradient in the values of block pixels is encoded at a high efficiency by an image processing apparatus which includes a division unit for dividing an image into block pixels to be encoded, a generation unit for generating parameters defining a plane based on values of first block pixels and values indicating positions of the block pixels to be encoded and a plane encoding unit for encoding difference values between the values of the block pixels indicated by the plane defined by the parameters and the values of the encoded block pixels.
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patent: 5122873 (1992-06-01), Golin
I.J. Dukhovich, "A DPCM System Based on a Composite Image Model", 8089 IEEE Transactions on Communications, vol. Com-31 (1983) Aug., No. 8, pp. 1003-1017, New York, USA.
C.H. Hsieh, "Adaptive Predictive Image Coding Using Local Characteritics", 8049 IEE Proceedings-I, 136(1989) Dec. No. 6, Part I.
Nobutaka Kuroki, "Lossless Image Compression by Two-Dimensional Linear Prediction with Variable Coefficients", IEICE Trans. Fundamentals, vol. E75-A, No. 7, Jul. 1992.
Charles W. Rutlege, "Variable Block Vector DPCM: Vector Predictive Coding of Color Images", Proceedings of the ICC-87, vol. 1, Jun 7-10, 1987, pp. 130-135.
Hirabayashi Yasuji
Kajiwara Hiroshi
Yoshida Tadashi
CanonKabushiki Kaisha
Chen Wenpeng
Lee Thomas D.
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