This is an extended version of applyColorMap from OpenCV, so based on applyColorMap function.
Why it is developed: to see the change of some pixel (homogenous ) in detail.
The image will be changed to heatmap according to your own settings.
How to use (example in file): you need to set the image, min value, max value. the option is the method (style) of the heatmap.
Enjoy it!