imgutils.edge.canny

Overview:

Get edge with cv2.Canny.

Having the fastest running speed and the lowest system resource overhead.

get_edge_by_canny

imgutils.edge.canny.get_edge_by_canny(image: str | PathLike | bytes | bytearray | BinaryIO | Image, low_threshold=100, high_threshold=200)

Overview:

Get edge mask with cv2.Canny.

Parameters:

• image – Original image (assuming its size is HxW).

• low_threshold – Low threshold of canny, default is 100.

• high_threshold – High threshold of canny, default is 200.

Returns:

A mask with format float32[H, W].

edge_image_with_canny

imgutils.edge.canny.edge_image_with_canny(image: str | PathLike | bytes | bytearray | BinaryIO | Image, low_threshold=100, high_threshold=200, backcolor: str = 'white', forecolor: str | None = None) → Image

Overview:

Get an image with the extracted edge from image.

Parameters:

• image – Original image (assuming its size is HxW).

• low_threshold – Low threshold of canny, default is 100.

• high_threshold – High threshold of canny, default is 200.

• backcolor – Background color the target image. Default is white. When transparent is given, the background will be transparent.

• forecolor – Fore color of the target image. Default is None which means use the color from the given image.

Returns:

An image with the extracted edge from image.

Examples::