Although quantization is a very effective technique for data compression, direct application to raw image data has some drawbacks that are in general independent of the specific method of quantization employed. For example, a significant disadvantage of vector quantization (VQ) is the well-known “bl...
In this chapter, we begin our study of quantization, one of the simplest and most general ideas in lossy compression. We will look at scalar quantization and continue with vector quantization in the next chapter. First, the general quantization problem is stated, then various solutions are ...
scalar quantization[¦skā·lər ‚kwän·tə′zā·shən] (computer science) A data compression technique in which a value is presented (in approximation) by the closest, in some mathematical sense, of a predefined set of allowable values. McGraw-Hill Dictionary of Scientific & ...
VQ is usually, but not exclusively, used for the purpose of data compression. Nevertheless, there are interesting parallels with scalar quantization and many of the structural models and analytical and design techniques used in VQ are natural generalizations of the scalar case....
Fingerprint Image Compression and the Wavelet Scalar Quantization Specification Due to the large number and size of fingerprint images, data compression has to be applied to reduce the storage and communication bandwidth requirements of those images. In response to this need, the FBI developed a finge...
系统标签: quantization scalar quantizers quantizer encoder codeword 9ScalarQuantization9.1OverviewInthischapter,webeginourstudyofquantization,oneofthesimplestandmostgeneralideasinlossycompression.Wewilllookatscalarquantizationandcontinuewithvectorquantizationinthenextchapter.First,thegeneralquantizationproblemisstated,then...
An improved lattice vector quantization scheme for wavelet compression We present an image compression scheme ModLVQ, which is based on set partitioning in hierarchical trees (SPIHT) and includes a modified lattice vector codebook and more effective timing of the vector coding. The experimental results...
Image coding using vector quantization in the transform domain Two new image-coding systems are proposed. In the first system a one-dimensional Hadamard transform is applied on each row of image data, and a vector-quan... A R.,King,and,... - 《Pattern Recognition Letters》 被引量: 46发...
Parent Case Data: CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation-in-part of co-pending U.S. patent application Ser. No. 07/833,529, filed Feb. 11, 1992, by Jan P. Allebach et al, entitled "Sequential Product Code Quantization of Digital Color Image," ...
We also study the low-resolution regime and show that Lb-ECSQ significantly outperforms ECSQ in the case of 1-bit quantization. Keywords: source coding; scalar quantization 1. Introduction Entropy-constrained scalar quantization (ECSQ) is a well-known compression scheme where a scalar quantizer ...