# Natural Scenes Statistics account for Human Cones Ratios

Perception, European Conference on Visual Perception (ECVP 2010), Number 39, page 101 - 2010

IF: 1.293. area: PSYCHOLOGY. Quartile: 3.

IF: 1.293. area: PSYCHOLOGY. Quartile: 3.

An underlying principle of visual science is that the characteristics of visual systems are determined by evolution to facilitate survival in the environments where these visual systems function. In particular, the number and peak wavelength of the cone photoreceptors in the retina seem to be the product of natural selection [Mollon, 1989 J. Exp. Biol 146 21-38; Párraga et al, 2002 Curr. Biol 12(6) 483-487]. In this work, we explored whether the dissimilarities of densities between the three types of colour photoreceptors, in particular the low density of short wavelength cones, are due to the statistics of natural scenes. We built a colour image representation which allowed us to model and parameterize different cone densities. We then determined the spatial distribution of the parameters which provide power spectrum values near to the ideal one, ie −1, to which processing in the human visual pathway is optimised [Field, 1987 JOSA 4(12) 2379-2394; Atick and Redlich, 1992 Neural Comp 4 196-210; Párraga et al, 2002 Curr. Biol 12(6) 483-487]. We found a high correlation between this distribution and the cone ratio distribution observed in the human population. Our results show that cone ratios are optimally suited to provide the best value of Fourier amplitude spectrum for natural image statistics.

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## BibTex references

@InProceedings\{PPV2010, author = "Olivier Penacchio and C. Alejandro Parraga and Maria Vanrell", title = "Natural Scenes Statistics account for Human Cones Ratios", booktitle = "Perception, European Conference on Visual Perception (ECVP 2010)", number = "39", pages = "101", year = "2010", abstract = "An underlying principle of visual science is that the characteristics of visual systems are determined by evolution to facilitate survival in the environments where these visual systems function. In particular, the number and peak wavelength of the cone photoreceptors in the retina seem to be the product of natural selection [Mollon, 1989 J. Exp. Biol 146 21-38; P\'arraga et al, 2002 Curr. Biol 12(6) 483-487]. In this work, we explored whether the dissimilarities of densities between the three types of colour photoreceptors, in particular the low density of short wavelength cones, are due to the statistics of natural scenes. We built a colour image representation which allowed us to model and parameterize different cone densities. We then determined the spatial distribution of the parameters which provide power spectrum values near to the ideal one, ie \−1, to which processing in the human visual pathway is optimised [Field, 1987 JOSA 4(12) 2379-2394; Atick and Redlich, 1992 Neural Comp 4 196-210; P\'arraga et al, 2002 Curr. Biol 12(6) 483-487]. We found a high correlation between this distribution and the cone ratio distribution observed in the human population. Our results show that cone ratios are optimally suited to provide the best value of Fourier amplitude spectrum for natural image statistics.", ifactor = "1.293", quartile = "3", area = "PSYCHOLOGY", url = "http://cat.uab.es/Public/Publications/2010/PPV2010" }