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T13 ? ?
EBU Universal Film Test Chart
(EBU Tech. 3087 ? specification 8/1.1)
The T13 is designed for checking color
and neutral gray reproduction, relative
modulation depth, gradation and granularity
of film material for evision. On a neutral
gray background three groups of test
components (grays, colors, resolution
patterns) are arranged within the picturerelevant
area.