Question

Is it possible to get the width and height of an image in node.js (on the server side, not the client side)? I need to find the width and height of an image in a node.js library that I’m writing.

Answer 1

Yes this is possible but you will need to install GraphicsMagick or ImageMagick.

I have used both and I can recommend GraphicsMagick it’s lot faster.

Once you have installed both the program and it’s module you would do something like this to get the width and height.

gm = require('gm');

// obtain the size of an image
gm('test.jpg')
.size(function (err, size) {
  if (!err) {
    console.log('width = ' + size.width);
    console.log('height = ' + size.height);
  }
});