Hadamard coded modulation correlation imaging threshold processing method

A technology of correlated imaging and coding modulation, applied in the field of image processing, can solve the problems of image information flooding, low target image brightness, high noise image brightness, achieve good results and promote practical effects

Active Publication Date: 2018-12-18
JILIN TEACHERS INST OF ENG & TECH
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[0006] The object of the present invention is to provide a threshold value processing method for Hadamard coded modulation correlation imaging, which solves the problem of Hadamard transform base calculation correlation imaging. Due to the high brightness of

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  • Hadamard coded modulation correlation imaging threshold processing method

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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The imaging noise of Hadamard modulation correlation imaging is mainly composed of environmental noise and system noise. The noise distribution presents Gaussian distribution characteristics, and its statistical properties are uniformly distributed in the frequency domain after multiple sampling. The reconstructed image noise manifests as point-like discrete distribution, and its spatial distribution characteristics are related to the energy concentratio...

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Abstract

The invention discloses a threshold value processing method of Hadamard code modulation correlation imaging. The segmentation threshold is determined according to the gray histogram characteristics ofthe reconstructed image obtained by Hadamard matrix modulation correlation imaging, then, the target image is segmented by using the determined segmentation threshold, and the image after the threshold segmentation is subjected to morphological filtering. The morphological filtering comprises the following steps: firstly, the image after the threshold segmentation is subjected to etching operation to eliminate the point noise in the image, and then the binary target image contour is obtained by dilation operation; at last, the outline of the target image is used to enhance the image after thethreshold segmentation, and the point noise around the target image is removed to obtain a clear image. The threshold value processing method of the invention has high feasibility, obtains nearly 8dBoptical image enhancement, has good effect on binary images and gray images, and effectively promotes the practicality of the correlation imaging technology.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a threshold value processing method of Hadamard coded modulation correlation imaging. Background technique [0002] Correlation imaging, also known as quantum imaging and ghost imaging, is a new technology that uses the correlation of spatial light field intensity fluctuations to achieve image reconstruction. Different from traditional optical imaging which uses "point-to-point" imaging to record target object information, correlation imaging uses a single-pixel detector (also known as a bucket detector) without spatial resolution to record the total intensity value of the light field containing object information. The modulated light field of the irradiated object is associated with the calculation to reconstruct the image information of the target object. [0003] Classical correlation imaging adopts a dual optical path scheme. After the modulated light field is split...

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Application Information

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IPC IPC(8): G06T7/136G06T5/40G06T5/30G06T5/00
CPCG06T5/002G06T5/30G06T5/40G06T7/136G06T2207/10052
Inventor 安晓峰李艳秋马海钰桑爱军周成宋立军
Owner JILIN TEACHERS INST OF ENG & TECH
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