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无失真图象压缩编码在某些对图象质量要求比较高的应用领域具有一定的应用价值。静态图象压缩标准 JPEG中给出了无失真压缩算法即 DPCM差分预测编码 ,本文通过对其中定义的七种预测算子压缩性能进行分析和比较 ,指出图象本身所包含的行相关以及列相关特征对于预测算子的选择具有一定的参考价值 ,从而在一定程度上提高预测的准确性 ,缩小预测误差 ,提高压缩效率。
Non-distorted image compression coding has certain application value in some application fields that require high image quality. The static image compression standard JPEG is given a non-distortion compression algorithm that is DPCM differential prediction coding. By analyzing and comparing the compression performance of the seven prediction operators, we point out that the image itself contains the row correlation and column correlation The features have certain reference value for the selection of prediction operators, so as to improve the accuracy of prediction to a certain extent, reduce the prediction error and improve the compression efficiency.