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January 7, 2016 06:32
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Taking fft of the squares in https://imgh.us/eca.png
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| convert eca.png -crop 400x400 +repage tiles_%03d.png | |
| convert -dispose previous -loop 0 tiles_*.png eca.gif | |
| for i in $(ls tiles*); do convert $i -fft +depth +adjoin fft_%d_$i; done | |
| convert -dispose previous -loop 0 fft_1_tiles_*.png eca-fft-phase.gif | |
| convert -dispose previous -loop 0 fft_0_tiles_*.png eca-fft-mag.gif |
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