Image processing is a one important part in software development. There are many good libraries like imagemagick, GD for PHP, RMagic for Ruby… But what’s for node.js? Here is a list of image processing library on node.js.
- I tried it first since I’m quite familiar with
<canvas>API. It’s a huge plus for a library.
- it requires Cairo which doesn’t have an easy Windows download. I found it in GTK+ distribution though.
- moreover it needs native library binding code to be compiled on module installation. It uses Node-Waf hasn’t being ported to Windows yet.
- runs on Windows smoothly
- docs are ok but not thorough: I had to look up into source code to figure out what API is available
- unfortunately there’s no easy way to combine images with gm. Maybe there’s some way to achieve that but I haven’t found one after two hours spent with it.
- The official repo has very few basic ImageMagick commands covered but I used this fork (good thing that NPM can pull libraries directly from git repositories). It has bindings for
montagewitch does exactly what I need.
- ImageMagick is quite slow, though it works on Windows.
- Huge plus: it uses an incredible VIPS library which I’m familiar with. VIPS is very fast and optimized for large images. It’s very smart about utilizing hardware resources: if your machine has a lot of RAM it’ll do all processing in memory but will switch to hard-drive caches if memory is scarce or required for other applications.
- same as node-canvas it requires Node-Waf so it’s now available yet for Windows.