Halide SAR Application Demo

An (in progress) SAR application written in Halide. Based on the RITSAR backprojection implementation.

Prerequisites:

C/C++ compiler with C++17 support, including standard library features, e.g. GCC >= 7.3
Distributed Halide and transitive dependencies (e.g., LLVM 11 and MPI); see also Halide
cnpy
FFTW3
MPI, e.g., OpenMPI

Compiling

Build with CMake:

mkdir build
cd build
export PKG_CONFIG_PATH=/path/to/fftw-install-prefix/lib/pkgconfig/
cmake .. -DCMAKE_PREFIX_PATH="/path/to/halide-install-prefix/lib64/cmake/Halide/;/path/to/cnpy-install-prefix/"
make -j

Testing

Two datasets are available for testing.

The AFRL dataset contains 469 radar pulses, and the output image is 512x512
The Sandia dataset contains 1999 radar pulses, and the output image is 2048x2048

AFRL

To run the backprojection test with the AFRL dataset:

./sarbp -p ../data/AFRL/pass1/HH_npy -o AFRL.png -d -30.0 -D 0.0 -t 17 -u 2

or with a GPU CUDA schedule:

./sarbp -p ../data/AFRL/pass1/HH_npy -o AFRL-cuda.png -d -30.0 -D 0.0 -t 17 -u 2 -s cuda

or with a CPU distributed schedule:

mpirun -np 4 ./sarbp -p ../data/AFRL/pass1/HH_npy -o AFRL-cpu_distributed.png -d -30.0 -D 0.0 -t 17 -u 2 -s cpu_distributed

Sandia

To run the backprojection test with the Sandia dataset:

./sarbp -p ../data/Sandia/npy -o Sandia.png -d -45.0 -D 0.0 -t 30 -u 2