crop_with_gravity

gistfile1.txt

{
    "application_id":"YOUR_APP_ID",
    "src":"http://cdn.blitline.com/filters/boys.jpeg",
    "functions":[
        {
            "name":"crop",
            "params":{
                "gravity": "NorthGravity",
                "only_shrink_larger" : true,
                "width":100
            },
            "save":{
                "extension":".png",
                "image_identifier":"MY_CLIENT_ID",
                "png_quantize":true
            }
        }
    ]
}