There are many issues to simple programs. For me The most intresting is change image.
Golang have good library to image so was funny.
I had problem to type of values. Libs use RGB in uint8 (0,255) but I need avarage in to greater scope (3x255) so I converted values to int32, I was doing my job and converted back.
I wanted do "black and white" and "sepia" transformation
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