This is what it looks like when a neural net colorizes photos

The results are all over the map, but a few of the test images — like the puppy and Monarch butterfly above — look pretty good. The algorithms work using a few common sense rules (the sky is typically blue, dirt roads are usually brown and have a similar texture), and “hallucinating” a plausible colorized photo. But the results are far from perfect. For example, the neural net has a hard time coloring within the lines with more complex subjects like vegetables on a plate or keeping a heron…

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This is what it looks like when a neural net colorizes photos