resize-filter
The resize-filter parameter enables control over the resizing filter used to generate a new image with a higher or lower number of pixels.
Syntax
resize-filter={value}Allowed values
| Value | Description |
|---|---|
nearest | Uses the value of nearby translated pixel values. |
bilinear (or linear) | Uses an average of a 2x2 environment of pixels. |
bicubic (or cubic) | Uses an average of a 4x4 environment of pixels, weighing the innermost pixels higher. |
lanczos2 | Uses the Lanczos filter to increase the ability to detect edges and linear features within an image and uses sinc resampling to provide the best possible reconstruction. |
lanczos3( or lanczos) | Lanczos3 uses a better approximation of the sinc resampling function. (Default) |
Notes
- When making an image smaller, use
bicubic, which has a natural sharpening effect. - When making an image larger, use
bilinear, which has a natural smoothing effect. - When resizing pixel art, use
nearest, which has a natural pixelation effect. - When quality is the main concern, use
lanczos, which typically renders the best results.
Examples
Click the links to view the transformed image using a demo Fastly IO service.
| Example usage | Description |
|---|---|
?resize-filter=bilinear | Deliver an image that has been resized using the bilinear filter. |
