{ 
  "table":"all_controls",
  "layout":"form",
  "onecolumn":true,
  "caption": "Image Upload",
  "fields": [
    {"name":"x_primary", "type":"int", "key":1},
    {"name":"x_image_basic","type":"file",
      "controlparams": {
        "data_folder": "tutorials_all_controls", 
        "image": {
          "format": "jpg"
        }
      }
    },
    {"name":"x_image_crop","type":"file",
      "controlparams": {
        "data_folder": "tutorials_all_controls", 
        "image": {
          "crop": [300,300],
          "format": "jpg"
        }
      }
    },
    {"name":"x_image_resize","type":"file",
      "controlparams": {
        "data_folder": "tutorials_all_controls", 
        "image": {
          "resize": [300,300],
          "format": "jpg"
        }
      }
    },
    {"name":"x_image_resize_extend","type":"file",
      "controlparams": {
        "data_folder": "tutorials_all_controls", 
        "image": {
          "resize": [300,300,{ "upsize": true, "extend":  true }],
          "format": "jpg"
        }
      }
    }
  ]
}