smartcrop-gm

smartcrop-gm

This is an adapter module for using smartcrop.js with node.js using gm for image decoding.

Smartcrop-gm requires image magick to be installed and available in $PATH to function.

Installation

npm install --save smartcrop-gm

API

crop(image, options)

Image: string (path to file) or buffer

Options: options object to be passed to smartcrop

returns: A promise for a cropResult

Example

var request = require('request');
var gm = require('gm').subClass({ imageMagick: true });
var smartcrop = require('smartcrop-gm');

function applySmartCrop(src, dest, width, height) {
  request(src, { encoding: null }, function process(error, response, body) {
    if (error) return console.error(error);
    smartcrop.crop(body, { width: width, height: height }).then(function(result) {
      var crop = result.topCrop;
      gm(body)
        .crop(crop.width, crop.height, crop.x, crop.y)
        .resize(width, height)
        .write(dest, function(error) {
          if (error) return console.error(error);
        });
    });
  });
}

var src = 'https://raw.githubusercontent.com/jwagner/smartcrop-gm/master/test/flower.jpg';
applySmartCrop(src, 'flower-square.jpg', 128, 128);

Face Detection

Check out smartcrop-cli for a more advanced example of how to use smartcrop from node including face detection with opencv.

Security Considerations

smartcrop-gm is using imagemagick for decoding and resampling images. A number of security issues have been found in imagemagick recently. Make sure that you take the appropriate steps to protect your infrastructure.