An image compression method combining discrete wavelet transform (DWT) and vector quantization (VQ) is presented. First, a three-level DWT is performed on the original image resulting in ten separate sub bands. These sub bands are then vector quantized. VQ indices are Huffman coded to increase ...
Let's perform an equivalent (in terms of size of resulting quantized image) vector quantization. Instead of 2 bits/pixel, we'll allocate 4 bits per 2D vector, but now we can take the freedom to place the 16 vectors of the codebook anywhere in the diagram. To minimize the mean quantizati...
2013. A Vector Quantization Technique for Image Compression using Modified Fuzzy Possibilistic C-Means with Weighted Mahalanobis Distance. IJNIRCCE. 1(1).Dr.S.Sathappan, "A Vector Quantization Technique for Image Compression using Modified Fuzzy Possibilistic C-Means with Weighted Mahalanobis Distance"...
Patel, "Image Compression Using DWT and Vector Quantization", International Journal of Innovative Research in Computer and Communication Engineering, Vol. 1, Issue 3, May 2013.Tejas S. Patel, Ravindra Modi, Keyur J. Patel, "Image Compression Using DWT and Vector Quantization", International ...
Quantization(量化) Definition: a process of representing a large–possibly infinite – set of values with a muchsmallerset. Widely Used in Lossy Compression Represent certain image components with fewer bits (compression) With unavoidable distortions (lossy) ...
vector quantizationmultiresolution decompositionsimage compressionimage codingvisual systemsubband codingnonlinear optimizationmultiplicative visual modelAn image compression scheme is introduced which involves a multiresolution decomposition derived from the wavelet transform. The use of this transformation in image ...
http://en.wikipedia.org/wiki/Vector_quantization http://www.data-compression.com/vq.html http://www.authorstream.com/Presentation/aSGuest47782-409450-vector-quantization-image-compression-method-science-technology-ppt-powerpoint/ http://www.willamette.edu/~gorr/classes/cs449/Unsupervised/competitive.ht...
Image Compression Using DWT and Vector Quantization Ideally, an image compression technique removes redundant and/or irrelevant information, and efficiently encodes what remains. Image compression is most important for efficient transmission and storage space of images. Image compression ... TS Patel,R ...
http:///wiki/Vector_quantization http:///vq.html http://www.authorstream.com/Presentation/aSGuest47782-409450-vector-quantization-image-compression-method-science-technology-ppt-powerpoint/ http://www.willamette.edu/~gorr/classes/cs449/Unsupervised/competitive.html...
Facical Image Compression Based on Wavelet Transform and Vector Quantization基于小波变换和矢量量化的人脸图象压缩 In the compression of some particular kinds of image sources, such as human face, vector quantization should naturally be considered to exploit its statist... LEI Han,sheng,ZHU Xiao,......