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Turn old B&W photos into 4K color with open-source AI. I tested 8 tools across 6 GPUs — only one produced stunning results in 42 seconds.
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I tested 8 different open-source AI upscalers and restoration tools to find the best pipeline for converting old black-and-white film footage into 4K colorized images for a YouTube history channel. After days of testing on rented GPU servers, the winning pipeline is surprisingly simple: Qwen-Image-Edit-2511 does everything — upscale, restore, AND colorize — in a single prompt, in under 60 seconds.