Speckle interference image noise reduction method and device

A speckle interference and noise reduction technology, which is applied in the field of noise reduction of speckle interference images, can solve the problems of strong noise reduction ability, long time consumption, and influence of filtering effect, and achieve the effect of filtering noise

Inactive Publication Date: 2020-02-07
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

[0003] In recent decades, the noise reduction methods for speckle interference images mainly include: first, the mean value filter of sin and cosine, which realizes denoising by mean filtering the phase image of sin and cosine, which is simple and effective, and is widely used. The average denoising effect is closely related to the number of filters. The denoising effect of one denoising process is not good, and it often takes 20 to 40 times. The more denoising times, the slower the filtering spee

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  • Speckle interference image noise reduction method and device
  • Speckle interference image noise reduction method and device

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[0039] Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.

[0040] The specific implementation manner of the present application will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0041] figure 1 It is a flow chart of a noise reduction method for a speckle interference image provided by an embodiment of the present a...

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Abstract

The invention discloses a speckle interference image noise reduction method and device. The method comprises the steps of converting a discontinuous original phase diagram into a continuous sine phasediagram and a cosine phase diagram through sine transformation and cosine transformation; performing noise reduction processing on the sine phase diagram and the cosine phase diagram by using stationary wavelet transform to obtain a sine noise reduction phase diagram and a cosine noise reduction phase diagram; and determining a target noise reduction phase diagram according to the sine noise reduction phase diagram and the cosine noise reduction phase diagram. According to the invention, the noise in the speckle interference image can be effectively and quickly filtered.

Description

technical field [0001] The present application relates to the technical field of digital speckle interference, in particular to a noise reduction method and device for a speckle interference image. Background technique [0002] The speckle interferometry technology records the speckle field generated by the interference between the reference light and the object light reflected from the rough surface of the object. According to the change of the phase map of the speckle field before and after the deformation of the object, the slight deformation of the object surface can be calculated. Due to the advantages of full-field, non-contact, and high-resolution speckle interferometry, it has been widely used in engineering measurements such as strain measurement, three-dimensional deformation measurement, and vibration evaluation. In the digital speckle interferometry technique, the speckle phase related to the deformation of the object is modulated in the [0, 2π] interval, which a...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/002G06T2207/20064
Inventor 李伟仙宁雪玲吴思进董明利祝连庆
Owner BEIJING INFORMATION SCI & TECH UNIV
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