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Add Magic Kernel Sharp (no relation) to resizing kernels
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@ -38,6 +38,8 @@ Possible downsizing kernels are:
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- `mitchell`: Use a [Mitchell-Netravali spline](https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf).
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- `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
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- `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
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- `mks2013`: Use a [Magic Kernel Sharp](https://johncostella.com/magic/mks.pdf) 2013 kernel, as adopted by Facebook.
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- `mks2021`: Use a Magic Kernel Sharp 2021 kernel, with more accurate (reduced) sharpening than the 2013 version.
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When upsampling, these kernels map to `nearest`, `linear` and `cubic` interpolators.
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Downsampling kernels without a matching upsampling interpolator map to `cubic`.
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@ -10,6 +10,8 @@ Requires libvips v8.17.0
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* Upgrade to libvips v8.17.0 for upstream bug fixes.
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* Add "Magic Kernel Sharp" (no relation) to resizing kernels.
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* Expose JPEG 2000 `oneshot` decoder option.
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[#4262](https://github.com/lovell/sharp/pull/4262)
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[@mbklein](https://github.com/mbklein)
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2
lib/index.d.ts
vendored
2
lib/index.d.ts
vendored
@ -1729,6 +1729,8 @@ declare namespace sharp {
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mitchell: 'mitchell';
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lanczos2: 'lanczos2';
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lanczos3: 'lanczos3';
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mks2013: 'mks2013';
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mks2021: 'mks2021';
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}
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interface PresetEnum {
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@ -150,6 +150,8 @@ function isResizeExpected (options) {
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* - `mitchell`: Use a [Mitchell-Netravali spline](https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf).
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* - `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
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* - `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
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* - `mks2013`: Use a [Magic Kernel Sharp](https://johncostella.com/magic/mks.pdf) 2013 kernel, as adopted by Facebook.
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* - `mks2021`: Use a Magic Kernel Sharp 2021 kernel, with more accurate (reduced) sharpening than the 2013 version.
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*
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* When upsampling, these kernels map to `nearest`, `linear` and `cubic` interpolators.
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* Downsampling kernels without a matching upsampling interpolator map to `cubic`.
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@ -188,6 +188,8 @@ sharp(input)
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// of the image data in inputBuffer
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});
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sharp(input).resize({ kernel: 'mks2013' });
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transformer = sharp()
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.resize(200, 200, {
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fit: 'cover',
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