I am working on a simpleITK Image Registration method using Regular gradient descent method. I was interested to know how does the simpleITK able to highlight differences between the Fixed image and Moving images.
For example below is one of the tutorials which shows different coloring with Pink & green colors: Fixed Image - Red Moving Image - Green
http://kevin-keraudren.blogspot.in/2014/12/medical-image-analysis-ipython-tutorials.html
Image Courtesy - Kevin Keraudren.