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Increasing image resolution.

Give a small picture more pixels in your browser: two or four times as wide and tall with Real-ESRGAN. The detail is made up, not recovered.

By Suraj Kumar8 November 20262 min read

A small, blocky picture of a dog beside the same picture four times as large and sharp, marked as made up by a model

Resolution is how many pixels a picture has.

More pixels.

Enlarging gives a picture more pixels to print or show larger; a model fills them with plausible detail rather than blur.

How long.

Each 128-pixel part goes through the model; on WebAssembly a megapixel takes a minute or two, faster on a device's graphics.

Resolution for print.

A print's sharpness depends on pixels per inch; enlarge until the size you print has about 300.

Further reading

Wang et al., Real-ESRGAN: training real-world blind super-resolution with pure synthetic data, ICCVW 2021 (opens in a new tab)

Topics: increase image resolution · increase resolution · image resolution · higher resolution · low resolution fix

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