This project is an implementation of an MPI version of the Sobel operator for image processing. Here is a description of the project folder :
| File | Description | Inputs |
|---|---|---|
| sobel.cpp | MPI program that implements the sobel operator in OpenMPI | arg[1]: image_path |
| sobel_seq.cpp | Sequential Sobel operator program | arg[1]: image_path |
| pgm_generator.cpp | Generates a P5 pgm image with random values | arg[1]: width, arg[2]: height |
| pgmlib.c | A library to read P5 pgm files (GEEKSFORGEEKS) |
The files data1.txt and data2.txt contain the execution time for generated images of sizes (2000x2000, 4000x4000, 6000x6000, 8000x8000, 10000x10000).
You can compile and execute the MPI program using :
$ mpic++ sobel.cpp -o sobel
$ mpirun -n <number_of_nodes> sobel <path_to_P5_pgm_image>You can compile and execute the sequential program using :
$ g++ sobel_seq.cpp -o sobel_seq
$ ./sobel_seq <path_to_P5_pgm_image>You can use an MPI profiler (MPIP) to generate a simple report containing information about the communication overhead. The rest of the images used for performance comparison are available here : https://filesamples.com/formats/pgm