Abstract: After analyzing the reconstructed image quality of the computer-synthesized hologram (CSH), a method to improve the reconstructed image quality of the CSH is provided. The zero-order diffraction will decrease the contrast of reconstructed image, while the cyclic shift effect of twice Discrete Fourier Transform (DFT) will shift the twin image’s last row and last column to the first row and first column, respectively. Burch’s method is adopted to eliminate the zero-order diffraction, while the pixel location is adjusted to eliminate the virtual image cyclic shift, the original image of CSH can be reconstructed accurately. This method is effectively proved by experiments.

Key words: computer application, image processing, Burch synthesized hologram, zero-order diffraction and cyclic shift