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78‐3: The Optimized Condition for Display Sparkle Contrast Measurement of Anti‐Glare Cover Glass based on the Solid Understandings
Author(s) -
Isshiki Masanobu,
Inouye Aichi,
Tamada Minoru,
Kobayashi Yusuke
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13127
Subject(s) - contrast (vision) , property (philosophy) , optics , lens (geology) , cover (algebra) , point (geometry) , scattering , computer vision , materials science , ranking (information retrieval) , aperture (computer memory) , artificial intelligence , computer science , mathematics , physics , acoustics , geometry , engineering , mechanical engineering , philosophy , epistemology
Sparkle contrast strongly depends on the measurement conditions, such as Working Distance (WD), F# setting of lens, filtering method of removing the display pixel components, etc. However, there is no established understanding how and why the sparkle contrast depends on the measurement conditions. We have succeeded to explain the dependence clearly from the view point of spatial frequency range limited by Aperture Angle (AA), camera sampling property, filtering property, and the angular distribution of the AG scattering property. We also showed the ranking of sparkle contrast could be inversed in some conditions, and we found that AA should be set to 0.35 degree or less to evaluate the sparkle level which we observed by human‐eye.