Parallel algorithm for fringe pattern demodulation

In this paper, we present a parallel implementation of a fixed-point algorithm for finding the solution of the total variation model for phase demodulation. The total variation model is efficient in estimating discontinuous phase maps, background illumination, and amplitude modulation from a single fringe pattern. The implementations include execution in a multi-core CPU and a GPU using OpenMP and CUDA, respectively. We show performance comparisons of the parallel implementations with 64-bit and 32-bit precision floating-point numbers using synthetic and real experimental data. Results show that our parallel implementations achieve speedups over the serial implementation of 9x for multi-core CPU and 103x for GPU.