Method for expanding view field range based on calculation of ghost imaging penetrating scattering medium

Abstract

The invention discloses an imaging method for expanding a view field range based on calculation of a ghost imaging penetration scattering medium. The method comprises two processes of modulation and detection of a structured light field and image recovery. The light field modulation and detection uses digital micromirror equipment to perform binary modulation on a light source, and a modulation matrix is a randomized differential Hadamard matrix; and after differential operation is performed on signals in the image recovery process, target information is recovered by using an association algorithm. Ground glass and a shielding object with a hole are introduced between a detector and an object, the effect of limiting the view field range of the shielding object or the small hole is counteracted through the scattering effect of the ground glass; penetrating scattering medium imaging is achieved and the effect of expanding the view field range is achieved to a certain degree. The method provides the application prospect for calculating ghost imaging in a penetrating scattering medium; and when the field of view existing in a detection section is limited by occlusion of an occlusion object, field of view expansion imaging can be achieved through the method. The cost is low, the reconstruction speed is high, and the reconstruction quality is high.

Description

Technical field [0001] The invention relates to an imaging method based on calculating ghost imaging penetrating a scattering medium to expand the field of view, and belongs to the technical field of precision optical measurement. Background technique [0002] In traditional imaging methods, most systems follow the imaging formula in geometric optics, imaging objects on the detector target surface through a lens or lens group for detection and recording. This process is theoretically a perfect imaging, namely Each point on the image surface corresponds to a point on the object surface one-to-one. This mapping relationship can be obtained by tracing the rays that interact with the object. Therefore, in traditional imaging systems, it is very important for light to spread in space. Once there is a large noise or obstruction in the light path, the mapping relationship will be destroyed and the final image quality will be greatly reduced or even imaging will not be possible. Therefo...

AI Technical Summary

Problems solved by technology

And when the spatial bandwidth product of the system is constant, the size of the field of view will decrease with the increase of the resolution. To expand the field of view, the size of the image plane can be enlarged by splicing detectors, and it can also be relieved by multi-aperture synthesis. The contradiction between field of view and resolution, but these methods are more expensive

Through precise optical system design, it is difficult to use lens groups to change the position of the field diaphragm and increase its size, and it is easy to introduce the influence of other aberrations

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