GPU-based implementation of an accelerated SR-NLUT based on N-point one-dimensional sub-principal fringe patterns in computer-generated holograms

An accelerated spatial redundancy-based novel-look-up-table (A-SR-NLUT) method based on a new concept of the N-point one-dimensional sub-principal fringe pattern (N-point1-D sub-PFP) is implemented on a graphics processing unit (GPU) for fast calculation of computer-generated holograms (CGHs) of three-dimensional (3-D)objects. Since the proposed method can generate the N-point two-dimensional (2-D) PFPs for CGH calculation from the pre-stored N-point 1-D PFPs, the loading time of the N-point PFPs on the GPU can be dramatically reduced, which results in a great increase of the computational speed of the proposed method. Experimental results confirm that the average calculation time for one-object point has been reduced by 49.6% and 55.4% compared to those of the conventional 2-D SR-NLUT methods for each case of the 2-point and 3-point SR maps, respectively.