Presentation 2006/3/15
A Role of Accommodation Mechanism in Perceiving Digital Halftone Still Images
Michimasa KOINUMA, Toshikazu MATSUI,
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Abstract(in English) Accommodative responses to digital halftone still images are measured to discuss what part in the human vision system can be related to the function to demodulate digital halftone still images. Stimuli used in the experiment consisted of two kinds of digital halftone still images binarized by an error-diffusion method: sinusoidal waves with different spatial frequencies and numerical letters with different sizes, and the accommodative responses were measured using an infrared optometer while the subjects were paying attention to the dot structure or the signal component modulated by the dots. The following results were obtained: (1) the accommodation error changes depending on which component is paid attention to, and increases more when paying attention to the signal component; (2) the accommodation error when paying attention to the signal component increases as the sine-wave's spatial frequency decreases and the letter size enlarges; (3) the above results are independent of viewing distance. These results suggest that the accommodation mechanism is a cooperative system which interacts with the still image processing part in human vision, and that accommodation error may be one of the parts producing the difference of appearance for digital halftone still images.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Accommodation / Digital halftone still image / Attention / Accommodation error
Paper # HIP2005-157
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Conference Information
Committee HIP
Conference Date 2006/3/15(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Role of Accommodation Mechanism in Perceiving Digital Halftone Still Images
Sub Title (in English)
Keyword(1) Accommodation
Keyword(2) Digital halftone still image
Keyword(3) Attention
Keyword(4) Accommodation error
1st Author's Name Michimasa KOINUMA
1st Author's Affiliation Graduate School of Engineering, Gunma University()
2nd Author's Name Toshikazu MATSUI
2nd Author's Affiliation Graduate School of Engineering, Gunma University
Date 2006/3/15
Paper # HIP2005-157
Volume (vol) vol.105
Number (no) 682
Page pp.pp.-
#Pages 6
Date of Issue