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Character‐contrast measurements on reflective displays using replica masks
Author(s) -
Kelley Edward F.,
Eghtesadi Caesar,
Blubaugh Morgan,
Reuschel William
Publication year - 2011
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/jsid19.10.685
Subject(s) - replica , specular reflection , contrast (vision) , optics , illuminance , character (mathematics) , measure (data warehouse) , high contrast , computer science , diffuse reflection , reflection (computer programming) , detector , computer vision , artificial intelligence , physics , mathematics , art , geometry , database , visual arts , programming language
— A replica‐mask method is presented to measure the contrast of character strokes on reflective displays. The method accounts for veiling glare introduced into the detector by the bright areas surrounding the dark characters. A sampling sphere is employed to provide a uniform diffuse surround. Measurements of the diffuse reflectances are provided with specular included and with specular excluded. For reflective displays, the contrast is the same as the ratio of the reflectances and does not scale with illuminance levels. Details are provided to replicate the measurement procedure.