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Fan Zhang, Wenfei Jiang, Florent Autrusseau, Weisi Lin; Exploring V1 by modeling the perceptual quality of images. Journal of Vision 2014;14(1):26. doi: 10.1167/14.1.26.
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© ARVO (1962-2015); The Authors (2016-present)
We propose an image quality model based on phase and amplitude differences between a reference and a distorted image. The proposed model is motivated by the fact that polar representations can separate visual information in a more independent and efficient manner than Cartesian representations in the primary visual cortex (V1). We subsequently estimate the model parameters from a large subjective data set using maximum likelihood methods. By comparing the various model hypotheses on the functional form about the phase and amplitude, we find that: (a) discrimination of visual orientation is important for quality assessment and yet a coarse level of such discrimination seems sufficient; and (b) a product-based amplitude–phase combination before pooling is effective, suggesting an interesting viewpoint about the functional structure of the simple cells and complex cells in V1.
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