quantization


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Related to quantization: sampling, Quantization error, Quantization noise

quantization

[‚kwän·tə′zā·shən]
(communications)
Division of the range of values of a wave into a finite number of subranges, each of which is represented by an assigned or quantized value within the subrange.
(quantum mechanics)
The restriction of an observable quantity, such as energy or angular momentum, associated with a physical system, such as an atom, molecule, or elementary particle, to a discrete set of values.
The transition from a description of a system of particles or fields in the classical approximation where canonically conjugate variables commute, to a description where these variables are treated as noncommuting operators; quantization (first definition) is a result of this procedure.
(science and technology)
The restriction of a variable to a discrete number of possible values; thus the age of a person is usually quantized as a whole number of years.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
We show, that the histogram equalization works significantly faster than the successive mean quantization transform.
Analysis of Image Enhancement Methods for Outdoor-Applications
Sarkar solved the problem based on Angle Quantization Index Modulation (AQIM) within STDM framework [11].
Robust reversible watermarking based on normalized correlation quantization index modulation combined with Cdma techniques
By smoothing the transformed values over time, a better overall consistency could be achieved, although the initial selection of reference points might prove problematic, particularly since skipping the quantization step would be very costly in terms of computational effort, especially considering that video formats are often high-resolution.
IMAGE RECOLORING FOR COLOR-DEFICIENT VIEWERS
Although QL quantizer provides almost constant SQNR in the wide dynamic range of variances, even better results can be achieved with switched quantization technique.
Design of Switched Quantizers and Speech Coding Based on Quasi-Logarithmic Compandor
Since non-uniform block sizes are used, we need quantization matrices of sizes suitable for the 16 different block sizes.
JPEG-based Variable Block-Size Image Compression using CIE La*b*Color Space
while Signal to Quantization Noise Ratio (SQNR), representing the more indicative parameter for the quantizer performance assessment, is defined as [1-3]:
Three-Level Delta Modulation with Second-Order Prediction for Gaussian Source Coding
After applying the quantization, the compression ratio must be calculated to see the efficiency of the algorithm.
Combined DCT-Haar Transforms for Image Compression
In order to meet the requirements of the discrete time MDP approach, a quantization method is applied to approximate the continuous process of BOT.
Optimal Maneuver Strategy of Observer for Bearing-Only Tracking in Threat Environment
As it is typically the case regarding the quantization of systems with an infinite number of degrees of freedom, also in the quantization of the Dirac field in curved space-time, one must face the issue of ambiguity, or lack of uniqueness in the quantization procedure.
On the Uniqueness of the Fock Quantization of the Dirac Field in the Closed FRW Cosmology

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