Presentation 2001/11/11
A Model of Dual-Accommodative Functions in Human Vision's Accommodation Mechanism
Toshikazu Matsui,
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Abstract(in English) The accommodation mechanism in human vision could be regarded as having two kinds of functions(dual-accommodation mechanism) : one keeps the retinal image to be in-focus in response to the change in depth of object images(Accommodation I) ; the other makes it out of focus depending on the object images'property at a constant depth (Accommodation II). So far, both two functions have never been modeled. This report proposes a dual-accommodation model which can cope with both two functions. The proposed model is applied to object images of square-waves with unknown depths. Consequently, the following performances are clarified : (1)the two functions of the model work well and stably ; (2)the depths can be estimated regardless of the existence of textures ; (3)the amount of accommodation error caused by the square-wave images is small and almost constant in low spatial frequencies in the same way as experimental results ; (4)there exists an accommodation strategy of keeping the spatial gradient of edge to be constant in the brain. These results suggest that the proposed model is effective in reproducing the dual-accommodative functions in human vision.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Dual-accommodation / Double optimization / Depth / Accommodation error / Focus / Accommodation strategy
Paper # HIP2001-73
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Committee HIP
Conference Date 2001/11/11(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Model of Dual-Accommodative Functions in Human Vision's Accommodation Mechanism
Sub Title (in English)
Keyword(1) Dual-accommodation
Keyword(2) Double optimization
Keyword(3) Depth
Keyword(4) Accommodation error
Keyword(5) Focus
Keyword(6) Accommodation strategy
1st Author's Name Toshikazu Matsui
1st Author's Affiliation Graduate School of Engineering, Gunma University()
Date 2001/11/11
Paper # HIP2001-73
Volume (vol) vol.101
Number (no) 513
Page pp.pp.-
#Pages 6
Date of Issue