Secondary imaging method for restraining one-armed ghost imaging defocus blur

A defocus blur and secondary imaging technology, applied in the field of image processing, can solve the problems of large amount of calculation, many noise points, and difficult to work, and achieve the effect of improving utilization rate, saving data collection time, and saving calculation time

Active Publication Date: 2015-11-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The current processing method for defocus blur is mainly the blind restoration method afterwards (3. Soon-Yong Park, An image-based calibration technique of spatial domain depth-from-defocus. Pattern Recognition Letters, 2006, 27, 1318-1324) , but due to too many noise points in the

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  • Secondary imaging method for restraining one-armed ghost imaging defocus blur
  • Secondary imaging method for restraining one-armed ghost imaging defocus blur
  • Secondary imaging method for restraining one-armed ghost imaging defocus blur

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Embodiment

[0046] The secondary imaging method for suppressing the defocus blur of single-arm ghost imaging in the present invention can be used for reconstruction and restoration of defocus blur images of two-dimensional and three-dimensional objects, and the specific steps are as follows figure 2 The process shown is executed.

[0047] Definition of SNR:

[0048] M S E = 1 M N Σ x = 1 M Σ y = 1 N | f ( x , y ) - f t r ( x , y ) | 2 ...

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Abstract

The invention discloses a secondary imaging method for restraining one-armed ghost imaging defocus blur, which is used for improving defocus blur effects of one-armed ghost imaging. A simulation result of a first ghost imaging experiment is used for making a general judgment on actual object target distribution, certain image processing operation is then carried out on a blurred image, the image distribution is obviously distinguished, corresponding optical field modulation is thus carried out on next-time imaging, and finally, the target stands out from a blurred area of a second one-armed ghost imaging simulation result. The method of the invention focuses on mastering on accuracy of object information, interference of part of useless information is removed, and the utilization rate of measurement data is improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a secondary imaging method for suppressing defocus blur in single-arm ghost imaging. Background technique [0002] Ghost imaging, also known as intensity-correlated imaging, is a non-local imaging method based on the fluctuation of light field intensity. It is different from the traditional point-to-point imaging method, which can reduce the influence of severe weather conditions such as atmospheric turbulence and obtain relatively clear images. In 1995, Pittman et al. obtained the first ghost imaging of quantum effects using entangled light sources. In 2002, Bennink et al. did not rely on entangled light sources, but ghost imaging generated in classical light fields, which sparked heated debates. The argument points out that due to the similarity between the wave function propagation behavior of the two-photon light field and the coherence of the thermal radiation cor...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 张闻文张伟良陈钱顾国华何伟基
Owner NANJING UNIV OF SCI & TECH
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