Improving Image Quality Of Digital Holography

Digital holography is a new imaging technique that uses photosensitive electronic components in place of the ordinary camera to record the hologram, using digital calculation to reconstruct hologram.Digital holographic information storage and reconstruction have important conditions: getting the number of high-visibility holograms and removing light intensity of zero-order interference. In this paper, three aspects to solve these problems:Firstly, through controlling lasers polarization direction, enhancing the visibility of holograms, better to use holography to record information.Secondly, listing a variety of digital image processing means, smoothing or sharpening image, adjusting the distribution histogram, highlight information and suppress noise. Using threshold segmentation and edge detection to hologram reconstruct. Using filtering and pseudo-color processing to enhance the visibility of holograms and removing light intensity of zero-order interference.Finally, in the digital holographic experiments we carry out spatial filtering to road-ray structures. The subtraction between two holograms can eliminate the zero-order diffraction.In this paper, theory and experiment is very good to complete the envisaged results.