EN: Interpolated resolution
Enhanced resolution computed using software algorithm to make image appear as if scanned at higher resolution. Opposite is optical resolution, the inherent physical resolution. Both given as dots per inch (dpi), so 2,400 dpi scanner can be true optical resolution or computed, interpolated resolution.
Canon glossary us
Interpolated Resolution adds pixels to the image using complex software algorithms to determine what colour they should be. It is important to note that interpolation doesn’t add any new information to the image it just makes it bigger!.
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