Method of improving reproduction quality of noise-containing digital hologram

A digital hologram and hologram technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as poor holographic image effects, improve peak signal-to-noise ratio, improve visual effects, and overcome poor reproduction quality Effect

Inactive Publication Date: 2016-12-14
XINJIANG UNIVERSITY
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  • Application Information

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that in the prior art, the effect of reconstructing image processing on holographic images is poor, etc.

Method used

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Embodiment Construction

[0017] The following description will be made in conjunction with preferred embodiments of the present invention. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0018] Specifically, a method for improving the reproduction quality of a noisy digital hologram mainly includes the following steps:

[0019] a. Using Gamma transform to enhance the gray level of the noisy digital hologram;

[0020] b. Digitally reproduce the hologram obtained in step a;

[0021] c. Filter the reconstructed image obtained in step b.

[0022] The step a specifically includes building a classical hologram imaging optical path, using a CCD to obtain a noisy digital hologram, and using Gamma transformation to perform grayscale enhancement processing on the noisy digital hologram.

[0023] In step a, the Gamma transformation is specifically: S=cI Γ , I is the gr...

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Abstract

The invention discloses a method of improving the reproduction quality of a noise-containing digital hologram, comprising the steps of enhancing the grayscale of a noise-containing digital hologram through Gamma transform, digitally reproducing the hologram, and filtering the reproduced image. Thus, poor-quality hologram reproduction in the prior art is overcome, the visual effect of the reproduced image of a noise-containing hologram is improved significantly, and the peak signal-to-noise ratio of the reproduced image is improved.

Description

technical field [0001] The invention relates to the technical field of holographic image processing, in particular to a method for improving the reproduction quality of a noisy digital hologram. Background technique [0002] Digital holograms always contain various noises, such as speckle noise, CCD readout noise, etc. These noises will seriously affect the quality of the acquired image and reduce the signal-to-noise ratio. During the development of holography, noise has always been an important issue affecting the development and application of holography. At present, there are two main methods to improve the image quality of hologram reconstruction. The first type is to use optical methods to improve the quality of the reconstructed image by optimizing the optical path of hologram recording and reproduction; the second is to use digital image processing technology to improve the quality of the reconstructed image. . Using the first method can effectively improve the qual...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/10012G06T5/92G06T5/70
Inventor 黄晓辉贾振红
Owner XINJIANG UNIVERSITY
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