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Perceptivni efekti degradacije slike

Perceptive effects of image distortion

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Gvozdenović, Vasilije
Article (Published version)
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Abstract
Ispitivana je perceptivna osetljivost na promene u kvalitetu vizuelne stimulacije. Kao sredstvo variranja kompleksnosti stimulacije korišćen je JPEG filter primenjen na kompjuterskim slikama koje su bile stimulusi u dva eksperimenta. U prvom eksperimentu ispitanici su na skali kvaliteta procenjivali efekte degradacije na tri fotografije različite perceptivne kompleksnosti. Ustanovljena je negativna korelacija između stepena degradacije slike i procene kvaliteta, a faktor kompleksnosti slike se pokazao kao značajan. U drugom eksperimentu korišćen je zadatak vizuelne diskriminacije. Ispitanici su diskriminisali parove fotografija sačinjene od jedne nedegradirane fotografije i jedne degradirane u različitom stepenu. Stepen degradacije je išao od jedne do deset JPEG jedinica. Analize pokazuju da je faktor kompleksnosti značajan i da uspeh u vizuelnoj diskriminaciji varira u funkciji razlike kvaliteta fotografija u paru.
In the present study perceptive tolerance on image distortion was investigated. JPEG filer was used as a tool for degrading computer images, which were presented in two experiments. In the first experiment, subjects were estimating the effects of distortion on three images with different perceptive complexity. Regression analysis suggests that the distortion (JPEG quality) factor is a good predictor of estimated quality. The greater JPEG quality factor, the lower estimated quality of distorted image. In the second experiment, visual discrimination task was used. Subjects were discriminating pair of images (same / different) made by original, not distorted and distorted image with a different JPEG quality factor. Ranges of JPEG quality factor varied from one to ten JPEG units. Analyses shows that the factor of image complexity was statistically significant, indicating that visual discrimination is dependent on quality difference between images.
Keywords:
spacijalna frekvenca / procena kvaliteta / perceptivna diskriminacija / informaciona kompleksnost / degradacija slike / spatial frequency / quality estimation / perceptual discrimination / informational complexity / image degradation
Source:
Psihologija, 2000, 33, 1-2, 269-292
Publisher:
  • Društvo psihologa Srbije, Beograd

ISSN: 0048-5705

[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_reff_339
URI
http://reff.f.bg.ac.rs/handle/123456789/339
Collections
  • Radovi istraživača / Researcher's publications - Odeljenje za psihologiju
Institution/Community
Psihologija / Psychology
TY  - JOUR
AU  - Gvozdenović, Vasilije
PY  - 2000
UR  - http://reff.f.bg.ac.rs/handle/123456789/339
AB  - Ispitivana je perceptivna osetljivost na promene u kvalitetu vizuelne stimulacije. Kao sredstvo variranja kompleksnosti stimulacije korišćen je JPEG filter primenjen na kompjuterskim slikama koje su bile stimulusi u dva eksperimenta. U prvom eksperimentu ispitanici su na skali kvaliteta procenjivali efekte degradacije na tri fotografije različite perceptivne kompleksnosti. Ustanovljena je negativna korelacija između stepena degradacije slike i procene kvaliteta, a faktor kompleksnosti slike se pokazao kao značajan. U drugom eksperimentu korišćen je zadatak vizuelne diskriminacije. Ispitanici su diskriminisali parove fotografija sačinjene od jedne nedegradirane fotografije i jedne degradirane u različitom stepenu. Stepen degradacije je išao od jedne do deset JPEG jedinica. Analize pokazuju da je faktor kompleksnosti značajan i da uspeh u vizuelnoj diskriminaciji varira u funkciji razlike kvaliteta fotografija u paru.
AB  - In the present study perceptive tolerance on image distortion was investigated. JPEG filer was used as a tool for degrading computer images, which were presented in two experiments. In the first experiment, subjects were estimating the effects of distortion on three images with different perceptive complexity. Regression analysis suggests that the distortion (JPEG quality) factor is a good predictor of estimated quality. The greater JPEG quality factor, the lower estimated quality of distorted image. In the second experiment, visual discrimination task was used. Subjects were discriminating pair of images (same / different) made by original, not distorted and distorted image with a different JPEG quality factor. Ranges of JPEG quality factor varied from one to ten JPEG units. Analyses shows that the factor of image complexity was statistically significant, indicating that visual discrimination is dependent on quality difference between images.
PB  - Društvo psihologa Srbije, Beograd
T2  - Psihologija
T1  - Perceptivni efekti degradacije slike
T1  - Perceptive effects of image distortion
EP  - 292
IS  - 1-2
SP  - 269
VL  - 33
UR  - https://hdl.handle.net/21.15107/rcub_reff_339
ER  - 
@article{
author = "Gvozdenović, Vasilije",
year = "2000",
abstract = "Ispitivana je perceptivna osetljivost na promene u kvalitetu vizuelne stimulacije. Kao sredstvo variranja kompleksnosti stimulacije korišćen je JPEG filter primenjen na kompjuterskim slikama koje su bile stimulusi u dva eksperimenta. U prvom eksperimentu ispitanici su na skali kvaliteta procenjivali efekte degradacije na tri fotografije različite perceptivne kompleksnosti. Ustanovljena je negativna korelacija između stepena degradacije slike i procene kvaliteta, a faktor kompleksnosti slike se pokazao kao značajan. U drugom eksperimentu korišćen je zadatak vizuelne diskriminacije. Ispitanici su diskriminisali parove fotografija sačinjene od jedne nedegradirane fotografije i jedne degradirane u različitom stepenu. Stepen degradacije je išao od jedne do deset JPEG jedinica. Analize pokazuju da je faktor kompleksnosti značajan i da uspeh u vizuelnoj diskriminaciji varira u funkciji razlike kvaliteta fotografija u paru., In the present study perceptive tolerance on image distortion was investigated. JPEG filer was used as a tool for degrading computer images, which were presented in two experiments. In the first experiment, subjects were estimating the effects of distortion on three images with different perceptive complexity. Regression analysis suggests that the distortion (JPEG quality) factor is a good predictor of estimated quality. The greater JPEG quality factor, the lower estimated quality of distorted image. In the second experiment, visual discrimination task was used. Subjects were discriminating pair of images (same / different) made by original, not distorted and distorted image with a different JPEG quality factor. Ranges of JPEG quality factor varied from one to ten JPEG units. Analyses shows that the factor of image complexity was statistically significant, indicating that visual discrimination is dependent on quality difference between images.",
publisher = "Društvo psihologa Srbije, Beograd",
journal = "Psihologija",
title = "Perceptivni efekti degradacije slike, Perceptive effects of image distortion",
pages = "292-269",
number = "1-2",
volume = "33",
url = "https://hdl.handle.net/21.15107/rcub_reff_339"
}
Gvozdenović, V.. (2000). Perceptivni efekti degradacije slike. in Psihologija
Društvo psihologa Srbije, Beograd., 33(1-2), 269-292.
https://hdl.handle.net/21.15107/rcub_reff_339
Gvozdenović V. Perceptivni efekti degradacije slike. in Psihologija. 2000;33(1-2):269-292.
https://hdl.handle.net/21.15107/rcub_reff_339 .
Gvozdenović, Vasilije, "Perceptivni efekti degradacije slike" in Psihologija, 33, no. 1-2 (2000):269-292,
https://hdl.handle.net/21.15107/rcub_reff_339 .

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