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This is traditionally called a histogram in video. It allows you to see brightness by region, though it's typically stacked vertically.
by ryandamm 9y ago
This is traditionally called a histogram in video. It allows you to see brightness by region, though it's typically stacked vertically.
- no_gravity 9y agoInteresting. Do you have a link to such a histogram?
- deleted 9y ago[deleted]
- fyrstenberg 9y agoThis type is actually known as a luma waveform histogram: https://i.imgur.com/Gn4KQTW.png https://i.imgur.com/Gn4KQTW.png Source: https://github.com/epistemex/scopes https://github.com/epistemex/scopes
- TeMPOraL 9y agoIsn't histogram an entirely different thing? As far as I know, to make a histogram you'd iterate over all pixels and, for each of them, increment histogram[pixelBrightness]. Here the author is not counting pixels, but exchanging coordinates.
- emeraldd 9y agoDoesn't a histogram throw away the positional element of the pixel entirely and bin by the number of pixels at a particular brightness? This doesn't seem to do that ...
- nhoiunh4nth 9y agoYes 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=en_US https://support.apple.com/kb/PH12688?locale=en_US&viewlocale...
- Karliss 9y agoYou can keep one of the dimensions by making a histogram a 3d surface. 3d surface f(x,y)->z can be displayed as flat image with brightness representing z value. Brightness can be displayed using dithering. Putting all that together would result in more or less the same diagrams as described in article. With biggest difference being that information about left part of image is actually visible. Swapping x with brightness is a bit misleading as dithering effect of white dots on black background give much stronger feeling of varied brightness than actual brightness.