Image CompressionLesson 248Free preview
Increase Image Size
This lesson is part of Web Developer Tools · All levels
Summary
Enlarging an image means increasing the number of pixels, usually by interpolating an existing pixel. This process does not create new details, so the result can appear soft or blurred if the magnification is too large. Influential algorithm selection: Lanczos is good for photography, while the nearest neighbor maintains pixel art sharpness. Upscaling AI may seem impressive, but the details it produces are predictive.
Key points
- Upscaling adds pixels, not adds to the original detail.
- Nearest neighbor is suitable for pixel art, Lanczos/bicubic for photography
- Excessive expansion makes the edges blur and the texture appear fake
- AI upscaling can compile details that don't exist in the source.
- Save the original file before upscaling
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