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Visibility threshold in sharpness for people with different regional backgrounds
Author(s) -
Liu Lu,
Xia Jun,
Heynderickx Ingrid,
Yin Hanchun
Publication year - 2004
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1847756
Subject(s) - visibility , diagonal , china , image (mathematics) , people's republic , artificial intelligence , natural (archaeology) , computer science , computer vision , geography , mathematics , physics , optics , geometry , archaeology
— The influence of regional background on the visibility of sharpness differences has been investigated by blurring various still images to different extents. The assessment of sharpness has been performed both in China by Chinese people and in the Netherlands by European people. The results showed that both Chinese characters and Roman text were clearly more critical image material for judging sharpness than natural images. Independent on whether the image contained Chinese characters or Roman text, the visibility threshold for a difference in sharpness was the same for both the Chinese and European people. When related to a diagonal step response, the threshold on average equaled an angular resolution of 5 arcsec.