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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Image-convolution/J/image-convolution-2.j Normal file
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NB. kernels borrowed from C and TCL implementations
id_kernel=: (=&i.-)3 3
sharpen_kernel=: ({ _1,#@,)id_kernel
blur_kernel=: ($ *&%/)3 3
emboss_kernel=: id_kernel+(+/~ - >./)i.3
sobel_emboss_kernel=: (i:-:<:3)*/1+(<.|.)i.3
'blurred.ppm' writeppm~ blur_kernel kernel_filter readppm 'original.ppm'