gray filter

gray filter

[′gra ‚fil·tər]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The spot (edited to have what looks like an eerie gray filter from Instagram over it) shows a young boy narrating how he will never learn to ride a bike, get cooties from a girl, learn to fly, or get married, as a soft but deceptively uplifting song plays in the background.
Total light transmission of color filters was 17.65, 20.32, 20.57 and 20.28% for Polaroid gray filter, gray, brown and green filter respectively and the luminance of room was 476 cd [m.sup-2] and in sun was 1610 cd [m.sup.-2] for the distance and near tests as measured with a Hugner universal photometer Model S3.
However, Paired Samples-T test showed significant difference between stereopsis without filter and with gray filter and with polarized gray filter in the sunlight (p <0.001)(Table 2).
Having data analyzed with the Wilcoxon test, it showed that there was significant difference between color vision without filter and with gray, green, brown and polarized gray filters (p=0.006 for polarized gray, p=0.010 for green, p=0.014 for brown, and p=0.004 for gray filter).
Contrast sensitivity showed that the greatest increase was while wearing a gray filter in the sun.
Also, regarding stereo acuity, gray filter had a negative effect on stereopsis.
Status Without filter Without filter Gray filter Statistical in the room under the index sun light Mean [+ or -] SD 432.24 [+ or -] 421.60 [+ or -] 434.80 [+ or -] 106.95 114.77 970.58 Status Gray Polaroid Brown filter Green filter Statistical filter index Mean [+ or -] SD 427.20 [+ or -] 425.80 [+ or -] 419.20 [+ or-] 99.36 90.26 96.2 Table 2: Mean and SD of stereo-acuity in sunlight with and without filters.
Mocha's processing functions include image slicing, pseudo-color, monochrome and customizable lookup tables, true and pseudo-clearfield equalization, image arithmetic, gray filters, and histogram stretching.