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Add support for the "mitchell" kernel for image reductions (#1438)

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Daiz
2018-10-28 17:11:27 +02:00
committed by Lovell Fuller
parent 95ef6b3f71
commit 1fa388370e
6 changed files with 13 additions and 2 deletions
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2
lib/resize.js
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@@ -55,6 +55,7 @@ const strategy = {
const kernel = {
nearest: 'nearest',
cubic: 'cubic',
mitchell: 'mitchell',
lanczos2: 'lanczos2',
lanczos3: 'lanczos3'
};
@@ -110,6 +111,7 @@ const mapFitToCanvas = {
* Possible interpolation kernels are:
* - `nearest`: Use [nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation).
* - `cubic`: Use a [Catmull-Rom spline](https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline).
* - `mitchell`: Use a [Mitchell-Netravali spline](https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf).
* - `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
* - `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
*