Method for reducing digital holographic reproductive image phase coherent noise

A digital holography and phase coherence technology, applied in the field of digital holography, can solve the problem of not being able to better protect image detail information, achieve the effect of protecting edge detail information, accurately removing, and improving the quality of the reproduced image phase

Inactive Publication Date: 2018-04-13
程灏波
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Problems solved by technology

[0004] Aiming at the problem that existing algorithms cannot protect image details while removing phase coherent noise in digital holographic reconstructed images, the purpose of this invention is to propose a method for reducing phase coherent noise in digital holographic reconstructed images, which can effectively identify And remove phase coherent noise, significantly improve the phase quality of the reproduced image, while protecting the edge details

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  • Method for reducing digital holographic reproductive image phase coherent noise
  • Method for reducing digital holographic reproductive image phase coherent noise
  • Method for reducing digital holographic reproductive image phase coherent noise

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[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0017] A method for reducing phase coherent noise of a digital holographic reconstructed image of the present invention will be further described below with reference to the drawings in the embodiments of the present invention.

[0018] Step 1: Use the digital holographic reconstruction algorithm to obtain the wrapping phase map of the reconstructed image, and then solve the wrapping phase quality map at the pixel point (m, n) for the wrapping phase map: k is the square window size centered on the...

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Abstract

The invention discloses a method for reducing the phase coherence noise of a digital holographic reconstructed image, which is characterized in that: firstly, the digital holographic reconstruction algorithm is used to obtain the wrapped phase map of the reconstructed image, and then the wrapped phase quality map is obtained by calculation, and at the same time, the edge detection function is combined , to establish a normalized phase quality quantization parameter; evaluate the information of each pixel point of the phase through the normalized phase quality quantization parameter, establish a combined diffusion coefficient equation, and finally perform Iterative denoising. The method provided by the invention can more effectively identify and remove phase coherent noise, remarkably improve the phase quality of the reproduced image, and protect edge detail information at the same time.

Description

technical field [0001] The invention belongs to the field of digital holography, and in particular relates to a method for reducing the phase coherent noise of a digital holographic reconstructed image. Background technique [0002] Digital Holography is a comprehensive technology involving information optics, holography, optoelectronics and digital image processing technology. It is a new type of holographic imaging method. The hologram is recorded on the plate, and the hologram is digitally reproduced by the computer, and the intensity information and phase information of the object can be obtained at the same time, thereby realizing three-dimensional imaging. Digital holography technology can realize continuous real-time online recording; through digital reproduction, its amplitude and phase information can be quantitatively analyzed; and it has the advantages of non-contact and no damage. Based on these unique advantages, digital holographic microscopy is considered to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/13G06T7/136
CPCG06T5/002G06T7/13G06T7/136
Inventor 程灏波文永富
Owner 程灏波
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