Subtract images🔗

Subtracts a reference image from another image and outputs the difference.


  • image: Input image

  • reference: Reference image that will be subtracted from input images. A run-time error will occur if the type or size of the reference is not the same as that of the input.

  • allowNegativeGray: If this flag is true and the input images are both gray-level images, the output image will be signed 32-bit ints. Otherwise, the type of the output will be the same as that of the input.


  • image: Either abs(image - reference) (when allowNegativeGray is false) or image - reference (when allowNegativeGray is true).