Uncrop（图像扩展）

image_file is the original image to process.

an optional extend_left integer field corresponding to the number of pixels to add to the left of the image, maximum of 2k, defaults to 0.

an optional extend_right integer field corresponding to the number of pixels to add to the right of the image, maximum of 2k, defaults to 0.

an optional extend_up integer field corresponding to the number of pixels to add at the top of the image, maximum of 2k, defaults to 0.

an optional extend_down integer field corresponding to the number of pixels to add at the bottom of the image, maximum of 2k, defaults to 0.

an optional seed integer field between 0 and 100_000. Setting the seed makes the result deterministic (ie you will always get the same output).