Fast reflecting mirror image stabilizing device based subpixel phase related detection and fast reflecting mirror image stabilizing method based subpixel phase related detection

Abstract

The invention discloses a fast reflecting mirror image stabilizing method based on subpixel image related detection. A dithering optical axis of a photoelectric stabilization and tracking platform in a movement or vibration environment is subjected to stabilization and tracking and correction by using a fast reflecting mirror to deflect light beams. The method comprises the following steps of: firstly, calculating a subpixel level image offset caused by dithering of a photoelectric system by virtue of an image related method; then calculating an offset of an unstable optical axis according to optical parameters of a photoelectric imaging system in the photoelectric stabilization and tracking platform; feeding the offset of the unstable optical axis back to a controller of the fast reflecting mirror; and controlling the deflection of the fast reflecting mirror in real time to realize stabilization of the optical axis. The system can achieve image stabilization of a single frame frequency image and a video sequence, and eliminate video signal dithering or image blurring, caused by optical axis dithering, of a photoelectric-television sensor in the photoelectric stabilization and tracking platform, thereby improving video quality of the imaging system. Meanwhile, the aiming line stabilization precision and operational effectiveness of the photoelectric stabilization and tracking platform are improved. The method disclosed by the invention has the advantages of high speed, simplicity, high calculation precision, low cost and the like.

Description

technical field [0001] The invention belongs to the field of digital image processing and servo control, and mainly relates to a fast mirror (FSM) image stabilization method suitable for various photoelectric stabilization tracking platforms, specifically a fast mirror stabilization method based on sub-pixel phase correlation detection. Apparatus and methods. Background technique [0002] The photoelectric stable tracking platform is widely used in ground-based, vehicle-mounted, ship-borne, airborne, missile-borne and various aerospace equipment. When the imaging system on these platforms images the target, it will be due to some internal reasons (such as platform movement, shaking and attitude changes, etc.), or some external reasons (such as atmospheric effects, that is, wind effects or local pressure changes on the carrier, etc.) When various image sensors (cameras, multi-spectral and hyper-spectral sensors or TV or infrared sensors, etc.) are exposed, there is relative ...

AI Technical Summary

Problems solved by technology

However, the method in this patent is mainly suitable for high-resolution remote sensors, and the algorithm mentioned in the patent has a large amount of calculation, and the processing of the image is at the precision of the whole pixel, and the precision is not high

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