Circle Crop

circle_crop.json

{
    "application_id":"YOUR_APP_ID",
    "src":"https://s3.amazonaws.com/img.blitline/samples/city.png",
    "functions":[
        {
            "name":"composite",
            "params":{
                "src":"https://s3.amazonaws.com/img.blitline/samples/circle_crop_mask.png",
                "composite_op":"CopyOpacityCompositeOp",
                "as_mask":true
            },
            "save":{
                "image_identifier":"MY_CLIENT_ID"
            }
        }
    ]
}