ACHROMATIC VALUE
[Film Technology]
[Film Technology]
A continuous tonal wedge
displays a progressive series of tonal values black and white. A
step tonal wedge takes regular tonal intervals, and forms tonal
blocks, each proportional lighter than one below. This tonal scale can be calibrate for reference purposes.
Too many steps would make individual selection and matching difficult. Too few
steps would provide only a coarse indication of a system’s reproduction of tonal gradation, where a system cannot reproduce the
entire range tonal extremes become merged.
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