关键词: 信息处理技术, 图像处理, 三维矩阵, 宽离散余弦变换, 标量量化, 彩色图像, 编码压缩

Abstract: A new technique for the color image compression by the 3-dimensional(3D) matrix transform based on the submatrix model was proposed. The innovations of the technique consist in that the subsampling and YC submatrix techniques were used to divide the 3D submatrix to remove the redundance among the color image components and enhance the compression ratio. The concepts of Y classified 3D submatrix and C classified 3D submatrix were proposed in the YC submatrix technique. A linear uneven scalar quantization was adopted and a new operation method, the quantization division, was defined. The experiments showed that compared with the 3D matrix transform compression technique based on the vector quantization, the proposed technique is favorable by being independent of the given image and has better overall compression effect than technique JPEG.

Key words: information processing, image processing, 3D-matix, wide discrete cosine transform (WDCT), scalar quantization, color image, compression coding