Hadamard coded modulation correlation imaging threshold processing method

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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Problems solved by technology

[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 the noise image and the relatively low brightness of the target image, the image information is submerged and a clear image cannot be obtained. problems to achieve high-efficiency imaging and promote the practical application of correlative imaging techniques

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