The ethical dimensions of artificial intelligence (AI) image colourization were recently brought to public attention when several historical images were altered using digital algorithms.

Irish artist Matt Loughrey digitally colourized and added smiles to photos of tortured prisoners from Security Prison 21 in Phnom Penh, Cambodia, which was used by the Khmer Rouge from 1975-79. His photos were published in Vice and prompted outrage on Twitter.

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