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Method and device for removing noises of hologram

A hologram and noise technology, applied in the field of image processing, can solve problems such as noise pollution, quality impact, and image quality degradation, and achieve the effects of improving efficiency, improving quality, and improving visual effects

Active Publication Date: 2017-08-22
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the collection, storage, processing, transmission, and display of digital holograms, different degrees of distortion often occur, such as different types of noise pollution, which affect its quality.
Such as speckle noise, these noises will affect the quality of the image and reduce the signal-to-noise ratio
[0003] At present, the existing method of removing noise in the hologram is to use filtering to remove the noise, but directly using filtering to reproduce the phenomenon of the hologram will destroy the detailed information in the image, which will reduce the quality of the image

Method used

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  • Method and device for removing noises of hologram

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Embodiment Construction

[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0022] An embodiment of the present invention provides a method for removing hologram noise, such as figure 1 As shown, the method includes:

[0023] 101. Acquire a hologram to be processed.

[0024] Wherein, the hologram is a hologram containing speckle noise, and the hologram is photographed by a CCD optical sensor instead of a silver salt dry plate, so that it is converted into a digital hologram and can be stored in a computer...

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Abstract

The invention discloses a method and a device for removing noises of a hologram, relates to the field of image processing and is mainly used for solving the problem of reduced image quality due to the situation that detail information in an image is destroyed by directly using filtering for the reconstructed image of the hologram for existing noise in the hologram. The method of the technical scheme comprises the steps of acquiring a to-be-processed hologram, wherein the hologram is a speckle noise-contained hologram; carrying out denoising on the hologram according to a neural network method with an image denoising function; carrying out preset reconstruction processing on the denoised hologram to obtain the reconstructed image of the hologram; and filtering and denoising the reconstructed image according to a preset filtering algorithm. The method and the device are mainly used for removing the noises of the hologram.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and device for removing noise from a hologram. Background technique [0002] Holography is a technical means that can simultaneously record all information of the object's light wavefront, such as amplitude and phase information. With the development of computer technology, an optical sensor CCD is used instead of a silver salt dry plate to obtain a digital hologram. Then store the obtained hologram data in the computer, and the computer will reproduce the hologram according to the light wave diffraction model to realize digital holography. Digital holographic imaging is divided into two processes: optical recording and numerical reproduction. The numerical reproduction process is the reproduction process of optical holography simulated by computer. Through numerical calculation, the complex amplitude distribution of the image wave field is obtained, and the obtained inte...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/70
Inventor 范浩如黄晓辉贾振红
Owner XINJIANG UNIVERSITY