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Can You Upscale a Malfoid AI Portrait for a Poster? Lanczos vs FSRCNN vs Nearest, Measured With a Round-Trip Test

Short answer: yes for about 2x, and you should measure it, not trust the name of the filter. A small learned upscaler (FSRCNN, 40 KB, runs on a CPU through OpenCV) rebuilt my test portrait better than Lanczos or bicubic at 2x. At 4x every method was close to every other, because the detail simply i…

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  1. 2026-11-09 10:36 · DEV Community — AI
    Can You Upscale a Malfoid AI Portrait for a Poster? Lanczos vs FSRCNN vs Nearest, Measured With a Round-Trip Test

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