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Interpolators
Photo by aotaro is licensed under CC BY 2.0.
The following examples take the 4608x3072px original image and resize to 480x320px using various interpolators.
To fetch the original 4608x3072px image and generate the interpolator sample images:
curl -O https://farm6.staticflickr.com/5682/21978966091_b421afe866_o.jpg
node generate.js
Nearest neighbour
Bilinear
Bicubic
Locally bounded bicubic
Vertex-split quadratic b-splines (VSQBS)
Nohalo
GraphicsMagick
gm convert 21978966091_b421afe866_o.jpg -resize 480x320^ -gravity center -extent 480x320 -quality 95 -strip -define jpeg:optimize-coding=true gm.jpg