Light intensity transmission equation phase recovery method based on image fusion

A technology of light intensity transmission equation and image fusion, which is applied in the field of light intensity transmission equation phase recovery based on image fusion, can solve problems such as the contradiction of defocus distance selection, and achieve the effect of small recovery error, rich detailed information and high degree of fit.

Inactive Publication Date: 2019-12-03
XI AN JIAOTONG UNIV
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a light intensity transmission equation phase recovery method based on image fusion in view of the deficiencies in the above-mentioned prior art, which solves the problem of selecting the defocus distance in TIE precise phase recovery in the existing method. question

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  • Light intensity transmission equation phase recovery method based on image fusion
  • Light intensity transmission equation phase recovery method based on image fusion
  • Light intensity transmission equation phase recovery method based on image fusion

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[0055] Image fusion technology is a kind of complementary information for the same target image under different conditions to obtain a fused image, which is closer to the real image in terms of value and appearance while having the characteristics of the image before fusion. Generally speaking, image fusion from low to high includes: signal-level fusion, pixel-level fusion, feature-level fusion, and decision-level fusion. The classic methods used include: weighted average method; pyramid image fusion method; image fusion based on wavelet transform and other methods. In image fusion, proper fusion criterion is the key to successful fusion. In the phase recovery technology based on the light intensity transmission equation, the phase image restored by the smaller defocus distance better retains the high frequency information of the original image. The phase image restored by a larger defocus distance better retains the low-frequency information of the original image. By fusing...

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Abstract

The invention discloses a light intensity transmission equation phase recovery method based on image fusion. The method comprises the following steps: collecting a plurality of light intensity imagesunder different out-of-focus distances along an optical axis direction; respectively solving light intensity transmission equations under two conditions of small defocusing distance and large defocusing distance by utilizing fast Fourier transform; and fusing the phase distribution recovered under the condition of the two out-of-focus distances through an image fusion method to obtain a final phase result. According to the method, the problem of contradiction of departure distance selection in TIE phase recovery is solved. The recovered phase image is more accurate in numerical value and smaller in recovery error. From the perspective of the recovered image, the result is rich in detail information, the integrating degree of the overall shape and size and the real phase is higher, and theinfluence of noise is smaller.

Description

technical field [0001] The invention belongs to the technical field of phase recovery in optical measurement, and in particular relates to a phase recovery method of light intensity transmission equation based on image fusion. Background technique [0002] Phase recovery technology is a method of quantitative phase measurement using a non-interference method, which recovers phase information by directly measuring light intensity distribution information. Compared with traditional optical interferometry, it has the following advantages: low coherence requirements for light source (partially coherent light can be used); simple measurement optical path device; no need to introduce reference light, less demanding on test environment; no need for phase unwrapping, etc. . Therefore, it is widely used in biomedicine, astronomical telescopic systems, electronic or optical microscopic imaging, industrial detection and other fields. [0003] The mainstream of phase recovery technolo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G01J9/00
CPCG01J9/00G06T5/50G06T2207/20064G06T2207/20221
Inventor 赵自新樊晨张航瑛赵宏
Owner XI AN JIAOTONG UNIV
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