Improved observer dependent perception of weak edges when scanning an image in real time indicated by introducing 1/f noise into the primary visual cortex V1. Theory and experimental support

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dc.contributor.author Thornton-Benko, E en_US
dc.contributor.author Nguyen, Hung en_US
dc.contributor.author Hung, Arthur en_US
dc.contributor.author Thornton, Barry en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:42:40Z
dc.date.available 2010-05-28T09:42:40Z
dc.date.issued 2009 en_US
dc.identifier 2008007745 en_US
dc.identifier.citation Thornton-Benko E et al. 2009, 'Improved observer dependent perception of weak edges when scanning an image in real time indicated by introducing 1/f noise into the primary visual cortex V1. Theory and experimental support', Australasian Coll Physical Scientists & Engineers Medicine, vol. 32, no. 3, pp. 136-149. en_US
dc.identifier.issn 0158-9938 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/8349
dc.description.abstract We present results of a new process for generating 1/f type noise sequences and introducing the noise in the primary visual cortex which then enables improved perception of weak edges when an observer is scanning a complex image in real time to detect detail such as in mammogram reading sessions. It can be explained by an adaptation of information theory for functional rather than previous task-based methods for formulating processes for edge formation in early vision. This is enabled from a two "species" classification of the interaction of opposing on-centre and off-centre neuron processes. We show that non-stationary stochastic resonances predicted by theory can occur with 1/f noise in the primary visual cortex VI and suggest that signalling exchanges between VI and the lateral geniculate nucleus (LGN) of the thalamus can initiate neural activity for saccadic action (and observer attention) for weak edge perception. Improvements predicted by our theory were shown from 600 observations by two groups of observers of limited experience and an experienced radiologist for reference (but not for diagnosis). They scanned and rated the definition of microcalcification in clusters separately rated by the experienced radiologist. The results and supporting theory showed dependence on the observer's attention and orderly scanning. Using a compact simplified equipment configuration the methodology has important clinical applications for conjunction searches of features and for detection of objects in poor light conditions for vehicles. en_US
dc.language en_US
dc.publisher Australasian Coll Physical Scientists & Engineers Medicine en_US
dc.relation.hasversion Accepted manuscript version
dc.relation.isbasedon http://dx.doi.org/10.1007/BF03178641 en_US
dc.rights The original publication is available at www.springerlink.com
dc.title Improved observer dependent perception of weak edges when scanning an image in real time indicated by introducing 1/f noise into the primary visual cortex V1. Theory and experimental support en_US
dc.parent Australian Physical And Engineering Sciences in Me... en_US
dc.journal.volume 32 en_US
dc.journal.number 3 en_US
dc.publocation Adelaide en_US
dc.identifier.startpage 136 en_US
dc.identifier.endpage 149 en_US
dc.cauo.name FEIT.School of Elec, Mech and Mechatronic Systems en_US
dc.conference Verified OK en_US
dc.for 099900 en_US
dc.personcode 0000052792 en_US
dc.personcode 840115 en_US
dc.personcode 912647 en_US
dc.personcode 994994 en_US
dc.percentage 100 en_US
dc.classification.name Other Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity ISI:000271136100004 en_US
dc.description.keywords edge detection; 1/f noise; Lotka-Volterra equations; information theory; stochastic resonances en_US
dc.staffid en_US
dc.staffid 994994 en_US


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