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Great and easy to follow article! > For simplicity of computation, all standard dithering formulas push the error forward, never backward. If you loop through
by seanwilson 10y ago
Great and easy to follow article!
> For simplicity of computation, all standard dithering formulas push the error forward, never backward. If you loop through an image one pixel at a time, starting at the top-left and moving right, you never want to push errors backward (e.g. left and/or up).
Would the image look a lot different if you dithered it backwards from the bottom right pixel?
Are there dithering algorithms that consider the error in all directions instead of pushing the errors forward only?
- seanwilson 10y agoAnswering my own question; "3.3. Changing image parsing direction": http://caca.zoy.org/study/part3.html http://caca.zoy.org/study/part3.html The answer seems to be that changing the image parsing direction gets rid of some artifacts but introduces others while not vastly improving on faster and simpler approaches.
- dTal 10y ago>Would the image look a lot different if you dithered it backwards from the bottom right pixel? Isn't this equivalent to just rotating the image 180 degrees, dithering it, and rotating it back?