A foray into Floyd-Steinberg image dithering. I took the original picture from the Charles River Esplanade during the 8/21/2017 solar eclipse, then passed it through a dithering algorithm that I wrote in MATLAB. The only colors in this image are pure red, black, and white.
Sources:
http://www.tannerhelland.com/4660/dithering-eleven-algorithms-source-code/
https://en.wikipedia.org/wiki/Floyd%E2%80%93Steinberg_dithering
http://www.visgraf.impa.br/Courses/ip00/proj/Dithering1/floyd_steinberg_dithering.html
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