4.3 Article

Retina-V1 model of detectability across the visual field

Journal

JOURNAL OF VISION
Volume 14, Issue 12, Pages -

Publisher

ASSOC RESEARCH VISION OPHTHALMOLOGY INC
DOI: 10.1167/14.12.22

Keywords

spatial vision; detection; masking; peripheral vision; ganglion cells; natural images

Categories

Funding

  1. NIH [EY02688, EY11747]

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A practical model is proposed for predicting the detectability of targets at arbitrary locations in the visual field, in arbitrary gray scale backgrounds, and under photopic viewing conditions. The major factors incorporated into the model include (a) the optical point spread function of the eye, (b) local luminance gain control (Weber's law), (c) the sampling array of retinal ganglion cells, (d) orientation and spatial frequency-dependent contrast masking, (e) broadband contrast masking, and (f) efficient response pooling. The model is tested against previously reported threshold measurements on uniform backgrounds (the ModelFest data set and data from Foley, Varadharajan, Koh, & Farias, 2007) and against new measurements reported here for several ModelFest targets presented on uniform, 1/f noise, and natural backgrounds at retinal eccentricities ranging from 0 degrees to 10 degrees. Although the model has few free parameters, it is able to account quite well for all the threshold measurements.

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