Improving the Reconstructed Image Quality of 3D Digital Object Holography by Applying Digital Image Processing

摘要

A fundamental problem in 3D object digital holography is that the quality of the direct reconstructed image is unsatisfactory because of the presence of the zero-order diffraction and the speckle noise. For the characteristics of three-dimensional object digital holography, a set of numerical algorithms based on the wavelet analysis is introduced to process a digital hologram and its reconstructed image. A special filter in wavelet domain is performed to eliminate the zero-order diffraction and an improved wavelet based image fusion technique is used to reduce the speckle noise in order to obtain a reconstructed image with comparatively high quality. The proposed method is illustrated with experimental results.