TWO-STAGE FILTRATION ALGORITHM WITH INTERFRAME NON-CAUSAL PROCESSING FOR MULTICHANNEL IMAGE WITH PRESENCE OF UNCORRELATED NOISE
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2017, Vol 874, Issue 2017
Abstract
In many modern information and technical systems multichannel images have several applications. The multichannel image can be presented as a set of images of an object of a research which are received in various areas of a frequency range. Such images can be exposed to the distorting influence of the noise. One of the most widespread types of the noise is the additive uncorrelated noise. Optimal filtration algorithms are characterized by huge computing complexity that often limits their practical realization. Therefore development of algorithms of a filtration of multichannel images which provide the acceptable precision characteristics at moderate computing expenses is an important task. With use of property of conditional independence an expression for calculation of a posteriori density of probability of pixels of the multichannel image at a two-stage filtration with non causal frame and causal interframe processing in the presence of an additive uncorrelated noise is created. Expressions for the image pixel estimate calculation and dispersion of estimate error at a two-stage noncausal frame and causal interframe filtration for a Gaussian images filtration are created. Developed algorithm allows to lower a mean square deviation of estimate error more than twice in comparison with an algorithm of interframe averaging for a model example when48 processing the sequence of the Gaussian images distorted by additive white Gaussian noise. One-dimensional processing along each of coordinates is carried out at the first stage of an algorithm, and at the second stage union of the obtained data is made. The created algorithm is concretized for a case of processing of the Gaussian images distorted by additive white Gaussian noise. The two-stage approach implemented in the synthesized algorithm allows to reduce significantly computing complexity in comparison with an optimal algorithm, providing at the same time the acceptable precision characteristics and considering dimension of the multichannel image.
Authors and Affiliations
O. Liashuk, S. Vyshnevyi
Keywords
Related Articles
- EP ID EP455518
- DOI -
- Views 132
- Downloads 0
DATA PROTECTION WITH INTELLECTUAL SUPPORT OF ORGANIZATIONAL AND TECHNICAL AND OPERATIONAL MANAGEMENT
For the successful use of modern information technologies, it is necessary to effectively manage not only the network, but also information systems security (ISS), the information system on the level of the system must o...
JOINT DISCOVERY AND ESTIMATION OF INTENSITY OF UNSTATIONARY STREAM OF CALLS
The problem of joint detection and rating intensity of а stream applications in telecommunication system is examined. A mathematical model, which includes a flow model, procedure of estimation of parameters and threshold...
ANALYSIS OF THE METHODS OF SIGNAL DATA FUSION OF PARTIAL SPECTRAL CHANNELS IN THE MONITORING SYSTEMS OF OBJECTS AND SCENES
The article analyzes the methods of data fusion partial spectral channels multispectral system of monitoring objects and scenes, working in various parts of the electromagnetic spectrum whose essence is to implement proc...
MOBILE INFORMATION TECHNOLOGIES OF NAVIGATION OF A USER IN COMPLEX INDOOR ENVIRONMENT
The article depicts the indoors positioning technology and user mobile positioning devices. It describes the possibilities of computer technology of indoors positioning of the device when navigating the user through the...
Optimization the afc of sound reproduction device under the influence of acoustic noise
The state standard for audio frequency amplifiers (LFA) requires the uniform amplitude-frequency characteristic (AFC) in the frequency range from 40 Hz to 18 kHz. But the test of high quality amplifiers on motor vehicles...