Convert a color BMP file to gray using OpenMP, MPI and CUDA

Serial

g++ blur.cpp -o blur

./blur test.bmp

OpenMP icc -openmp grayMP.cpp -o grayMP

OR

gcc -fopenmp grayMP.cpp -o grayMP

./grayMP test.bmp 2

              ^Number of threads

MPI mpic++ -o grayMPI grayMPI.cpp

mpirun -n 4 grayMPi test.bmp

      ^number of threads

CUDA

nvcc grayCUDA.cu -o grayCUDA

./grayCUDA test.bmp 512 64

                 ^   ^ thread size

                 | block size