Pixelate Image With Pillow

Question

I am working on a project where I want to take a picture of a colored grid as an input (made with Lego bricks in this example) and return a much smaller modified picture.

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Answer 1

Just for fun, I tackled this with ImageMagick - which is also callable from Python...

First off, I create a little custom palette to match your colours - your white is not very white and your green is different from ImageMagick's idea of green so I used hex for them instead of colour names.

convert xc:black xc:red xc:"rgb(200,200,200)" xc:"rgb(168,228,23)"  xc:orange +append palette.png

If I scale that palette up, it looks like this:

Then I resize your image down to 4x4 and map the result to the custom palette and scale it back up so you can see it like this:

convert lego.jpg -resize 4x4! +dither -remap palette.png -scale 1600 result.png

and here is the result

The white is off to match the "white" in your original.