ABSDiffNode
===========

Overview
--------
Computes the absolute difference between two grayscale images.

Inputs
------
- Image 1 (GrayScaleImage)
- Image 2 (GrayScaleImage)

Parameters
----------
- None

Outputs
-------
- Result Image (GrayScaleImage): Absolute difference image

Example
-------
Use ABSDiffNode to highlight changes between two frames.