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dc.contributor.authorMartinecz, Antal
dc.contributor.authorNiitsuma, Mihoko
dc.date.accessioned2019-02-08T10:19:56Z
dc.date.available2019-02-08T10:19:56Z
dc.date.issued2018-10-04
dc.description.abstractIn the human retina, rod and cone cells detect incoming light with a molecule called rhodopsin. After rhodopsin molecules are activated (by photon impact), these molecules activate the rest of the signalling process for a brief period of time until they are deactivated by a multistage process. First, active rhodopsin is phosphorylated multiple times. Following this, they are further inhibited by the binding of molecules called arrestins. Finally, they decay into opsins. The time required for each of these stages becomes progressively longer, and each stage further reduces the activity of rhodopsin. However, while this deactivation process itself is well researched, the roles of the above stages in signal (and image) processing are poorly understood. In this paper, we will show that the activity of rhodopsin molecules during the deactivation process can be described as the fractional integration of an incoming signal. Furthermore, we show how this affects an image; specifically, the effect of fractional integration in video and signal processing and how it reduces noise and the improves adaptability under different lighting conditions. Our experimental results provide a better understanding of vertebrate and human vision, and why the rods and cones of the retina differ from the light detectors in cameras.en_US
dc.descriptionSource at <a href= https://doi.org/10.1371/journal.pone.0205099> https://doi.org/10.1371/journal.pone.0205099 </a>.en_US
dc.identifier.citationMartinecz, A.& Niitsuma, M. (2018). Fractional integral-like processing in retinal cones reduces noise and improves adaptation. PLoS ONE,13(10), e0205099. https://doi.org/10.1371/journal.pone.0205099.en_US
dc.identifier.cristinIDFRIDAID 1625947
dc.identifier.doi10.1371/journal.pone.0205099
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/10037/14654
dc.language.isoengen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.journalPLoS ONE
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Medical disciplines: 700::Basic medical, dental and veterinary science disciplines: 710::Human and veterinary science physiology: 718en_US
dc.subjectVDP::Medisinske Fag: 700::Basale medisinske, odontologiske og veterinærmedisinske fag: 710::Human og veterinærmedisinsk fysiologi: 718en_US
dc.titleFractional integral-like processing in retinal cones reduces noise and improves adaptationen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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