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Conference Paper: Constructing a metrics for blur perception with blur discrimination experiments

TitleConstructing a metrics for blur perception with blur discrimination experiments
Authors
KeywordsDivisive Inhibition
Luminance Contrast
Motion Picture Response Time
Mprt
Normalization
Issue Date2009
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml
Citation
Proceedings Of Spie - The International Society For Optical Engineering, 2009, v. 7242 How to Cite?
AbstractIn this study, we measured blur discrimination threshold at different blur levels. We found that the discrimination threshold first decreased and then increased again as reference edge width blur increased. This dipper shape of the blur discrimination threshold vs. reference width functions (TvW) functions can be explained by a divisive inhibition model. The first stage of the model contains a linear operator whose excitation is the inner product of the image and the sensitivity profile of the operator. The response of the blur discrimination mechanism is the power function of the excitation of the linear operator divided by the sum of the divisive inhibition and an additive factor. Changing mean luminance of the edge has little effect on blur discrimination except at very low luminance. When luminance is low, the blur discrimination was higher at small reference blur than those measured at medium to high luminance. This difference diminished at large reference blur. Such luminance effect can be explained by a change in the additive factor in the model. Reducing contrast of the edge shifted the whole TvW function up vertically. This effect can be explained by the decrease of gain factors in the linear operator. With these results, we constructed a metric for blur perception from the divisive inhibition we proposed and tested in this study. © 2009 SPIE-IS&T.
Persistent Identifierhttp://hdl.handle.net/10722/168890
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorChen, CCen_US
dc.contributor.authorChen, KPen_US
dc.contributor.authorTseng, CHen_US
dc.contributor.authorKuo, STen_US
dc.contributor.authorWu, KNen_US
dc.date.accessioned2012-10-08T03:37:50Z-
dc.date.available2012-10-08T03:37:50Z-
dc.date.issued2009en_US
dc.identifier.citationProceedings Of Spie - The International Society For Optical Engineering, 2009, v. 7242en_US
dc.identifier.issn0277-786Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/168890-
dc.description.abstractIn this study, we measured blur discrimination threshold at different blur levels. We found that the discrimination threshold first decreased and then increased again as reference edge width blur increased. This dipper shape of the blur discrimination threshold vs. reference width functions (TvW) functions can be explained by a divisive inhibition model. The first stage of the model contains a linear operator whose excitation is the inner product of the image and the sensitivity profile of the operator. The response of the blur discrimination mechanism is the power function of the excitation of the linear operator divided by the sum of the divisive inhibition and an additive factor. Changing mean luminance of the edge has little effect on blur discrimination except at very low luminance. When luminance is low, the blur discrimination was higher at small reference blur than those measured at medium to high luminance. This difference diminished at large reference blur. Such luminance effect can be explained by a change in the additive factor in the model. Reducing contrast of the edge shifted the whole TvW function up vertically. This effect can be explained by the decrease of gain factors in the linear operator. With these results, we constructed a metric for blur perception from the divisive inhibition we proposed and tested in this study. © 2009 SPIE-IS&T.en_US
dc.languageengen_US
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xmlen_US
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_US
dc.subjectDivisive Inhibitionen_US
dc.subjectLuminance Contrasten_US
dc.subjectMotion Picture Response Timeen_US
dc.subjectMprten_US
dc.subjectNormalizationen_US
dc.titleConstructing a metrics for blur perception with blur discrimination experimentsen_US
dc.typeConference_Paperen_US
dc.identifier.emailTseng, CH:tseng@hku.hken_US
dc.identifier.authorityTseng, CH=rp00640en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1117/12.806107en_US
dc.identifier.scopuseid_2-s2.0-62149102933en_US
dc.identifier.hkuros175130-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-62149102933&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume7242en_US
dc.identifier.eissn1996-756X-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChen, CC=7501959830en_US
dc.identifier.scopusauthoridChen, KP=35200460600en_US
dc.identifier.scopusauthoridTseng, CH=7402541752en_US
dc.identifier.scopusauthoridKuo, ST=35201422000en_US
dc.identifier.scopusauthoridWu, KN=35202686900en_US

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