Edge extraction method and system based on optical spin Hall effect space differentiator

Abstract

The invention discloses an image edge extraction method and system based on the optical spin hall effect space optical field differentiator. The space optical field differentiator is simple in structure and wide in material selection range, large in wavelength response range, easy to prepare and integrate and the like, and the image edges are extracted and processed. According to the invention, the coherent light is used as a carrier to load the image information as an input light field, so that the input light field of p / s polarization state is obliquely incident on the interface of the two different media or the interface of the medium and the metal. Due to the optical spin hall effect, the reflection or transmission field of the corresponding s / p polarization state is used as a one-dimensional first-order space differentiation result of the input light field, so that the edge extraction processing of the image information is realized. The edge extraction method provided by the invention is a super-fast and real-time, the large-flux image processing method, and an important technical application prospect in medical and satellite image processing is provided.

Description

technical field [0001] The invention relates to the field of optical information processing, in particular to an image edge extraction method and system based on an optical spin Hall effect space light field differentiator. Background technique [0002] With the rapid development of information technology, the demand for information processing performance is constantly increasing. Compared with the information processing methods of traditional electronic devices, optical information processing technology has gradually developed into an important information processing method due to its advantages such as ultra-fast, large bandwidth, large throughput, and low loss. However, traditional optical analog computing requires the use of a large number of macroscopic optical devices, which is not conducive to the miniaturization and integration of computing systems. [0003] In recent years, the use of micro-nano structures to realize optical analog calculations, as an emerging tech...

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Problems solved by technology

Since the spatial light field differentiator in this paper is based on prism-coupled metal surface plasmons, it can only realize the spatial light field simulation differential operation in reflection, and the differentiator can only respond to the input light field of a specific wavelength and incident angle , the working conditions are more restrictive, and it does not have a wide range of versatility

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