因为它们本身固有的多尺度性质,小波编码方法很适合那些重视可伸缩 性(scalability)和可容忍退化(tolerabledegradation)的应用。基于小波变换的图像压缩有着非常优越的特点。即压缩比 高、压缩速度快,压缩后能保持信号与图像的特征基本不变,且在传递过程中可以抗干扰等等。基于小波变换的图像压缩是在二维离散小波变换的基础...
One of the best image compression techniques is using wavelet transform. It is comparatively new and has many advantages over others. Wavelet transform uses a large variety of wavelets for decomposition of images. The state of the art coding techniques like EZW, SPIHT (set partitioning in ...
A combined approach of image compression based on vector quantization and wavelet transform is proposed using RBF neural network. This approach will be very helpful for medical imaging, criminal investigation where high precision reconstructed image is required. The experimental result shows that the ...
The wavelet transform shows a lot of promise in image compression. Very high compression rates are achieved by using wavelet transform prior to quantization and entropy coding. This report discusses how wavelets can be used in image compression. This report handles the problem from an engineer's ...
Integer wavelet transform for embedded lossy to lossless image compression IEEE Trans Image Process, 10 (2001), pp. 383-392 View in ScopusGoogle Scholar [14] W. Yung-Gi, T. Shen-Chuan Medical image compression by discrete cosine transform spectral strategy IEEE Trans Inf Technol Biomed, 5 (...
The image compression is the only solution. In this paper discrete wavelet Transform is used which is one of the major processing components of image compression. The wavelets transforms implemented here are Haar, Daubechies and Coiflet.Wavelet transformation is a technique that provides information ...
Image compression through wavelet transform coding A novel theory is introduced for analyzing image compression methods that are based on compression of wavelet decompositions. This theory precisely relates... DeVore,A R.,Jawerth,... - 《IEEE Trans.inform.theory》 被引量: 1622发表: 1992年 ...
are in place. But still here there is a scope for high compression with quality reconstruction. The JPEG standard makes use of Discrete Cosine Transform (DCT) for compression. The introduction of the wavelets gave a different dimensions to the compression. This paper aims ...
It is called the full wavelet transform (FWT). The authors use the FWT to transform an image into blocks of the same size, and show that these blocks have strong space-frequency correlation which can be effectively utilized to achieve high image compression ratio while preserving good image ...
This paper presents a wavelet based image compression algorithm specifically tailored for facial photographs. The proposed method dramatically reduces memory requirements for facial image databases. The algorithm makes it possible to reach compression rates of 0.25 to 0.1 bpp without compromising the visual...