摘要
提出了一种哈达玛变换,离散余弦变换和小波变换相结合的混合型编码,即先采用哈达玛变换对图像压缩,再对处理后的图像用离散余弦进行压缩,最后采用提升Haar小波格式对图像进行了压缩,并引入零树小波分析,得到最优小波树。仿真结果表明,所提出的方法在灰度图像压缩效果方面优于一些传统的压缩方法。
A mixed type of coding method is proposed by combining Hadama transform and discrete cosine transform with wavelet transform.Firstly,the image compression is carried out by using Hadama transform,and then the processed image is compressed by discrete cosine transform,finally the optimal wavelet tree is obtained by using lifting Haar format and applying zero tree wavelet analysis.The simulation results show that the proposed method has a better performance than that of traditional compression method in the aspect of gray image compression.
出处
《辽宁科技大学学报》
CAS
2010年第5期513-516,524,共5页
Journal of University of Science and Technology Liaoning
关键词
图像压缩
离散余弦变换
小波变换
image compression
discrete cosine transform
wavelet transform
