resizeCrop.js

              var data = {
                id      : uploaded_file._id,
                filters : [
                  {
                    name    : 'image',
                    options : [
                      {
                        operation : 'resize',
                        width     : $placeholder_img.width(),
                        height    : $placeholder_img.height()
                      },
                      {
                        operation : 'crop',
                        width     : target_width,
                        height    : target_height,
                        x         : $placeholder_img.css( 'left' ),
                        y         : $placeholder_img.css( 'top' )
                      } 
                    ]
                  }
                ]
              };