Random Scattering Optical Imaging System and Imaging Method Based on Sparse Representation

An optical imaging system and sparse representation technology, applied in optics, optical components, TV system components, etc., can solve the problems of huge reconstruction data, long time consumption, poor real-time imaging, etc., to simplify the structure and reduce imaging Cost, effect of removing background noise

Inactive Publication Date: 2017-04-19
XIDIAN UNIV
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Problems solved by technology

The wavefront modulation technology adjusts the wavefront of the incident light wave through feedback control, so that the adjusted light wave can be focused after passing through a random scattering medium. However, this imaging system based on optical phase conjugation has a complex optical path, poor real-time imaging and anti-noise performance. Poor, not suitable for imaging in noisy environments
The speckle field reconstruction technology realizes imaging by extracting the initial incident light wave information from the received speckle field image. It has good anti-noise performance, but it needs to measure the transmission matrix of the random scattering medium and directly reconstruct the entire speckle field. Huge, takes a long time

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  • Random Scattering Optical Imaging System and Imaging Method Based on Sparse Representation
  • Random Scattering Optical Imaging System and Imaging Method Based on Sparse Representation
  • Random Scattering Optical Imaging System and Imaging Method Based on Sparse Representation

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Embodiment Construction

[0035] The setting of the random scattering optical imaging system based on sparse representation of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, and an image reconstruction algorithm based on compressed sensing theory is used to process the coded speckle field image received by the detector array, and calculate The target image is recovered, and the background noise in the imaging process is removed at the same time.

[0036] refer to figure 1 , the imaging system of the present invention includes a light source 1, a spatial filter 2, an aperture stop 3, a collimator lens 4, a mirror 5, a spatial light modulator 6, a random scattering medium 7, a lens 8, a detector array 9 and a main control Machine 10. Among them: the light source 1 adopts a laser light source in the visible light band; the random scattering medium 7 adopts frosted glass with both strong scattering characteristics and good transmission c...

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Abstract

The invention discloses a random scattering optical imaging system and imaging method based on sparse representation. The imaging system includes a light source (1), a spatial filter (2), an aperture stop (3), a collimator lens (4), a mirror (5), a spatial light modulator (6), a random scattering medium (7), Lens (8), detector array (9) and main control machine (10). The light emitted by the light source enters the spatial light modulator through the reflector after passing through the spatial filter, aperture diaphragm and collimating lens; the main control computer loads the imaging target on the spatial light modulator, so that After the light passes through the random scattering medium and the lens, it forms a coded speckle field image on the detector array and transmits it to the main control computer; the main control computer decodes and reconstructs the coded speckle field image and removes background noise to obtain the target image. The invention has the advantages of simple structure, good real-time performance and strong noise resistance, and can be used for high-speed imaging of random scattering in a noise environment in a laboratory.

Description

technical field [0001] The invention belongs to the technical field of image processing and imaging, relates to an optical imaging system and image reconstruction, and can be used for high-speed random scattering imaging in a noisy environment in a laboratory. Background technique [0002] In random scattering media such as biological tissues and clouds, there is often multiple scattering, and the mean free path of light propagation inside the medium is extremely short, resulting in the loss of the relative position of the original incident light field when the light incident on the random scattering medium exits. relationship and cannot be clearly imaged. For example, satellite remote sensing imaging needs to collect light reflected from ground targets and pass through the atmosphere. For example, in the case of non-invasive and non-destructive detection, it is necessary to perform in-depth imaging of biological tissues, but due to the scattering of particles inside biolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/58H04N5/232
CPCG02B27/58H04N23/60
Inventor 邵晓鹏李慧娟代伟佳吴腾飞
Owner XIDIAN UNIV
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