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A comment on Show HN: Swapping Position and Brightness in Grayscale Images. Parent comment

Re:Show HN: Swapping Position and Brightness in Grayscale Im... by nhoiunh4nth on Tuesday December 19, 2017 @01:44PM (#15962775)
Yes it does. This is similar to what is shown on the video scopes of television engineers in the luma waveform view.

https://support.apple.com/kb/PH12688?locale=en_US&viewlocale...

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