图象数据压缩的DCT法
THE DCT METHOD FOR IMAGE DATA COMPRESSION
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摘要: 正 数字图象的数据率很大,因此在传输和存贮图象时必须考虑对图象数据加以压缩。压缩的方法主要有两大类,即预测编码法和变换编码法。变换编码法又分最佳变换和准最佳变换编码法。由于最佳变换需要计算图象的协方差矩阵及其特征向量和特征值,一般还没有快速算法,所以很难付诸实用。因而常采用准最佳变换。具有快速算法的准最佳
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Abstract: A set of computation formulas of discrete cosine transform (DCT) for image data eompression is given. The results of simulation experiment show that the formulas are correct and consistent with the formulas given by W. K. Pratt (1978), but they are different slightly in form. -
R. C. Gonzalez and P. Wintz: Digital Image Processing, Addison-Wesley Publishing Company. 1977.[2]W. K. Pratt: Digital Image Processing, John Wiley and Sons, Inc. 1978.[3]W. Chen.[J].C. H. Smith and Fratick: A Fast Computational Algorithm for the Discrete Cosine Transform IEEE Trans. on COM, COM-25(1977.1004,:- -
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