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Method and device for stochastic resonance reconstruction of low-light images based on cross-modulation instability

A cross-modulation and stochastic resonance technology, applied in image enhancement, image acquisition, image data processing, etc., can solve the problems of image discrete intensity modulation and loss of details, and achieve high feasibility and uniform intensity distribution

Active Publication Date: 2020-09-29
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the technical problems of discrete intensity modulation and loss of detail in the reconstructed image in the existing single-channel stochastic resonance reconstruction method, the present invention provides a low-light image stochastic resonance reconstruction method and device based on cross-modulation instability

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  • Method and device for stochastic resonance reconstruction of low-light images based on cross-modulation instability
  • Method and device for stochastic resonance reconstruction of low-light images based on cross-modulation instability

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Embodiment Construction

[0035] An embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] Such as figure 1 As shown, a device for implementing the stochastic resonance reconstruction method for low-light images based on cross-modulation instability in the present invention includes an imaging light source 1, a beam splitter 2, a first reflector 3, an attenuation plate 4, a first lens 5, Ground glass 6, diaphragm 7, second lens 8, second reflector 9, beam combiner 10, photorefractive crystal 11 and CCD 12; the imaging light source 1 is Nd:YAG laser, and the beam splitter 2 is 50 / 50 The beam splitter, the beam combiner 10 is a 50 / 50 beam combiner; the beam splitter 2 is located on the output optical path of the imaging light source 1, and the beam combiner 10 is located in the transmission light of the image signal formed by the imaging beam imaging the target object On the road; the first reflector 3, the attenuation sheet 4, the f...

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Abstract

The invention relates to a low-light image random resonance reconstruction method and device based on cross-modulation instability, which solves the technical problems of discrete intensity modulation and loss of image details in the existing single-channel random resonance reconstruction method. The method and device add a noise beam with controllable coherence, and combine the scattered image signal beam and the noise beam with controllable coherence to be transmitted together in the nonlinear crystal, causing mode coupling and phase modulation. The additional noise beam changes the spatial frequency composition of the scattered signal beam and provides sufficient energy for nonlinear coupling, so that the intensity distribution of the reconstructed enhanced low-light image is uniform and more high-frequency details are presented.

Description

technical field [0001] The invention belongs to the stochastic resonance reconstruction technology of low-light images, and relates to a method and device for stochastic resonance reconstruction of low-light images. Background technique [0002] Underwater imaging and atmospheric imaging have always been the focus of research, and various technologies are devoted to improving the distance and sensitivity of image detection in this environment. Water contains a large amount of organic matter, suspended particles and dissolved substances, and the atmosphere also contains fog, sol and particulate matter. These components will cause serious absorption and scattering of transmitted optical signals. When a laser beam carrying an image signal travels in these media, the intensity and coherence of the signal decay exponentially as the propagation length increases. The resulting scattering noise quickly overwhelms the image, resulting in a sharp decline in image quality. Various va...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06T5/00G01N21/47
CPCG06T1/0007G01N21/47G06T5/70
Inventor 刘红军王昭路黄楠张永斌
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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