3-D optical display 3-D optical imaging processing 3-D projection integral imaging 3D 3D display 3D imaging 3D imaging system Fourier spectra HREM JPEG Kalman filter absolute phase retrieval acousto-optic modulator augmented reality automatic focus detection block partitioned entropy minimization coherent imaging color holography compression computer generated holography computer holography computer-generated hologram convolutional neural network deep learning diffracted field diffraction gratings digital hologram digital holography dual-view display entropy minimization