Parallel Image: simple image processing program

Hello folks, here one of my study project I have been working lately, I wanted to get better at c++ and parallel execution code *both cpu with TBB and GPU with cuda),so I decided to do some image processing which is really good as exercise.
Right now the program is really basic with some black and withe and blur filter. In the future I plan to throw in qt and work on a nice UI where to drop in filters and stack them on top of each other. I also had to write a simple bitmap loader and saver because I wanted to read manually a binary file.
For more info you can check my blog post where I post a lot more data and details about the run time, stats and stuff:
Be sure to check my github repo, I will upload the code soon
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M.