The invention proposes a method of determining an index of a code vector (VC k ) belonging to a predetermined lattice, characterised in that it includes the steps of: determining (E 47 ) a leader vector (Y, VL k ) for the code vector (VC k ), seeking (E 50 , E 51 ) a ...
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 ...
In the present work, an image is decomposed into image blocks. In this scheme a low bit rate still image compression is performed by compressing the indices of vector quantization and residual codebook is generated by using Modified Fuzzy Possibilistic C-Means with Repulsion and Weighted Mahalanobis...
Image-compression algorithms based on vector quantization (VQ) techniques have been researched for years. Recently, such algorithms have been implemented in hardware by several graphics chip vendors. Unlike DXTn, VQ decompression is as easy to do in software as it is in hardware, and might be ju...
still image compressionvector quantizationadaptive resolution conversioncodebook designA novel image compression algorithm based on vector quantization (VQ) technique is proposed in this paper. Adaptive resolution VQ (AR-VQ) method, which is composed of three key techniques, i.e., the edge detection,...
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 quantization is one approach to image compression, the coding of an image so as to preserve the maximum possible quality subject to the available storage or communication capacity. In its most general form, vector quantization includes most algorithms for data compression as structured special ...
Vector quantization (VQ) is an important technique in digital image compression. To improve its performance, we would like to speed up the design process a... RY Li,J Kim,N Al-Shamakhi - 《Image & Vision Computing》 被引量: 88发表: 2002年 Medical ultrasound image compression using contextu...
We present a novel image compression technique using a classified vector Quantizer and singular value decomposition for the efficient representation of still images. The proposed method is called hybrid classified vector quantization. It involves a simple but efficient classifier-based gradient method in ...
Keywords: Vector Quantization; Genetic Algorithm; Image compression I. INTRODUCTION In image compression [9] [12], many researches have been focused on improving the quality of images, to decrease the bit rate and distortion. The storage and transmission of ...