Efficient Image Resizing – ImageMagick

  Many tools out there automate image resizing, but too often they create large files that cancel out the performance benefits that responsive images are supposed to deliver. We can use ImageMagick — an open-source command-line graphics editor to quickly resize your images, while maintaining great visual quality and really tiny file sizes. + Learn More - http://den-i.com/efficient-image-resizing-imagemagick/