Post-processing is a research area in computer graphics and visualization that involves applying various techniques to enhance or refine the output of simulation or rendering algorithms. This can include enhancing images to improve their visual quality, removing noise or artifacts, adding effects such as depth of field or motion blur, or performing compositing to combine multiple images or elements into a final composition. Post-processing techniques are commonly used in fields such as computer-generated imagery, video game development, scientific visualization, and virtual reality to improve the overall aesthetic and realistic appearance of the final output.