Photoelectricity mixing correlator based on position sensitive device (PSD) position detector

A photoelectric hybrid and detector technology, applied in instruments, optical computing equipment, etc., can solve the problems of low photoelectric conversion rate, cannot meet high-speed identification and tracking, etc., and achieve the effect of improving photoelectric conversion rate, strong practicability and reducing cost

Inactive Publication Date: 2013-05-15
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0014] However, the traditional optical correlator usually chooses CMOS / CCD and other planar array detectors as the detector of the correlation calculation result. The low photoelectric conversion rate becomes the bottleneck restricting its further development and cannot meet the requirements of high-speed identification and tracking.

Method used

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  • Photoelectricity mixing correlator based on position sensitive device (PSD) position detector
  • Photoelectricity mixing correlator based on position sensitive device (PSD) position detector
  • Photoelectricity mixing correlator based on position sensitive device (PSD) position detector

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Embodiment 1

[0058] Embodiment 1: Target tracking using an optoelectronic hybrid correlator

[0059] First, the embedded processor 5 is used to select the template image to be recognized in advance as a reference image, and the image is subjected to Fourier transform to obtain the frequency spectrum of the image. In order to improve efficiency, it is binarized and stored in the external memory 3 to complete the matching. filter making. Then the embedded processor 5 reads the matched filter in the external memory 3 into its own memory for subsequent operations. When the photoelectric hybrid processor is used for identification and tracking, the detector 2 collects the target image, and the embedded processor 5 is used to preprocess the image to obtain its spectrum, and then the spectrum is binarized. The matched filter is read out from the memory, and the binarized frequency spectrum of the target image and the reference image is input to the spatial light modulator 6 after dot multiplicat...

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Abstract

The invention relates to a photoelectricity mixing correlator based on a position sensitive device (PSD) position detector. For the first time, the PSD position detector is introduced into a matched filtering correlator, correlation peak information is collected by a PSD, and target position information is extracted according to the correlation peak information of a target image and a template image after photology correlation conversion. Photoelectric conversion efficiency is greatly improved, and simultaneously organic combination of flexibility of electronics and high speed of optics is achieved. A matched filter is conducted in advance by an electronics method, the target image and the template image are input into a spatial light modulator, optics Fourier transformation is conducted by a Fourier transformation lens, and related computing results are collected by the PSD position detector. The photoelectricity mixing correlator based on the PSD position detector can be applied to high-speed image stabilizing of video, high-speed identification and tracking of a target and the like.

Description

technical field [0001] The invention belongs to the field of information optics. The PSD position detector is applied to a matched filter correlator, which realizes the organic combination of the flexibility of electronics and the high speed of optics. the field of information processing. Compared with the traditional CCD / CMOS and other planar array detectors to collect correlation peak information, the photoelectric conversion rate is significantly improved, thereby realizing the high speed of the system. Background technique [0002] The Optical Correlator was first proposed by A.Vander Lugt ("Signal detection by complex spatial filtering," IEEE Trans. Inf. Theory IT-10, 139-145 (1964)). The optical correlator uses optical methods to realize the correlation calculation between the target image and the reference image, so as to realize the recognition and tracking of the image. The optical correlator has the characteristics of high speed and parallel processing, and is su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06E3/00
Inventor 唐武盛隋京高张小亚陈怡休贾辉李修建程攀攀
Owner NAT UNIV OF DEFENSE TECH
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