@roaders/node-red-contrib-image-path-crop

node-red-contrib-image-path-crop

Crops an image to an irregular path:

becomes

Nodes

Load Image

Loads a given path and outputs it as a Buffer. Buffer can be an input to path-crop-image node and is useful if you want to load an image once but crop it many times.

Inputs

• path - the path to the image

Path Crop Image

Crops an image to an irregular shaped path.

Inputs

• image - can be specified as a path to an image which will be loaded or can be specified as a Buffer that has already been loaded. To specify the output of the load-image node the node edit dialog should be set to msg.payload so that the Buffer in the message payload from the previous node can be used.

• cropPath - An array of points that form the path to be cropped. At least 3 points must be specified. Example:

            [
                {
                    "x": 530,
                    "y": 460
                },
                {
                    "x": 215,
                    "y": 800
                },
                {
                    "x": 933,
                    "y": 800
                }
            ]

• outputPath - Optional. If set the modified image will be saved to this path.

Inputs for both nodes can be directly specified in the node edit dialog or they can be specified in a message property or in the flow or global context.