Cat eye effect object recognition algorithm of active and passive imaging system sharing same aperture

An imaging system and target recognition technology, which is applied in the field of laser imaging and digital image processing, can solve the problems that the recognition method is not suitable for target recognition, and achieve the effect of improving accuracy

Inactive Publication Date: 2011-09-28
BEIHANG UNIV
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Purpose: This invention aims at the defect that the recognition method based on grayscale and shape features is not suitable for target recognition in complex backgrounds, and proposes an improved algorithm for the common aperture imaging system, that is, image difference operation is performed after image registration

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cat eye effect object recognition algorithm of active and passive imaging system sharing same aperture
  • Cat eye effect object recognition algorithm of active and passive imaging system sharing same aperture
  • Cat eye effect object recognition algorithm of active and passive imaging system sharing same aperture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The invention adopts a continuous laser as an active light source to realize all-weather target recognition, uses a dichroic beam splitter to reflect visible light through infrared light, and uses two CCD cameras to obtain active and passive images respectively.

[0020] figure 2 For the algorithm flowchart of the present invention, the specific steps of the algorithm are as follows:

[0021] 1. Image horizontal mirror flip and Gaussian filter: The active and passive images of the same scene are obtained through two CCDs. The system structure determines that the imaging of CCD1 and CCD2 is a horizontal mirror relationship. It is necessary to perform horizontal mirror flip on one of the images, and then use a Gaussian filter to Active and passive image filtering;

[0022] 2. Image registration: Image registration includes two parts: feature point detection and feature point matching. Use SIFT (Scale-InvariantFeature Transform, that is, scale invariant feature transfor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a cat eye effect object recognition algorithm of active and passive imaging systems sharing a same aperture. The algorithm is suitable for detecting and recognizing optical targets with a characteristic of cat eye effect. The algorithm of the invention improves the cat eye effect object recognition algorithm based on gray scales and shape features. For the active and passive imaging systems sharing the same aperture, differential operation is performed between active and passive images after image registration so that background can be filtered. Rough registering algorithm can be improved. A search scope of matching feature points in a second image can be reduced in horizontal and vertical directions. And algorithm efficiency can be raised. The algorithm possesses good utility value and wide application prospect in the fields of laser imaging and digital image processing technology.

Description

(1) Technical field [0001] The invention is a target recognition algorithm for photoelectric equipment or sighting equipment with optical lenses. The invention relates to acquiring active and passive images and identifying "cat's eye" effect targets by using a common aperture active and passive imaging system, belonging to the technical field of laser imaging and digital image processing. (2) Background technology [0002] When the laser is aimed at an optical system with an optical lens, the optical system can be approximately regarded as a combination of a lens and a focal plane of a detector. An "image spot" is formed nearby, and this "image spot" is equivalent to a light source. The laser beam is reflected back at a certain beam divergence angle through the optical system. According to the reversible principle of the optical path, the laser beam will return along the original path, thus producing The light intensity of concentrated parallel reflection light is much high...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/60
Inventor 李丽刘丽党二升吴磊
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap