Automatic registering method of visible lights and infrared images based on polygon approximation of contour

An infrared image, automatic registration technology, used in image analysis, image data processing, instruments, etc.

Inactive Publication Date: 2014-09-03
SHANDONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of existing multi-source image registration me

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  • Automatic registering method of visible lights and infrared images based on polygon approximation of contour
  • Automatic registering method of visible lights and infrared images based on polygon approximation of contour
  • Automatic registering method of visible lights and infrared images based on polygon approximation of contour

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0059] Step 1: Input the reference image and the image to be registered. Such as Figure 5-6 , are two known registered 734×473 infrared images and visible light images. Taking the infrared image as a reference image, the following three geometric transformations are performed on the visible light image (1) counterclockwise rotation 3 degrees; (2) horizontal displacement 5, vertical displacement 5; (3) horizontal displacement 5, vertical displacement 5, counterclockwise Rotate 3°; get three images to be registered, such as Figure 7-9 shown.

[0060] Step 2: Extract the contour information of the reference image and the three images to be registered respectively. Firstly, use the Canny operator to detect the edge of each image, and obtain the contour image with relatively large relative information between the reference image and the image to be registered...

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Abstract

The invention relates to an automatic registering method of visible lights and infrared images based on polygon approximation of a contour, belonging to the field of multi-source image registration. The method mainly comprises the following five steps: I, applying an edge detection operator and contour tracing algorithm to extract a main contour of an image; II, carrying out polygon approximation on the extracted contour; III, matching the fitted contour and selecting control points; IV, selecting an image transformation model and estimating transformation parameters; and V, carrying out corresponding transformation and interpolation operation to input images according to the transformation parameters. The method provided by the invention is high in registering precision and fast in speed and can effectively solve the automatic registering problem of visible lights and infrared images under rigid body transformation.

Description

technical field [0001] The invention relates to an automatic registration method of visible light and infrared images based on contour polygon fitting, and belongs to the field of multi-source image registration. Background technique [0002] Different from single-sensor images, visible light and infrared images from different sensors have large differences in gray value, image contrast, sensitive targets, etc., which increases the difficulty and complexity of image registration. Common image registration methods are divided into two categories: methods based on image grayscale and methods based on image features. Because the grayscale features of images acquired by different sensors are not consistent, it is difficult to register such images using image grayscale-based registration methods. The feature-based registration method can extract the salient features of the image, such as contours, corners, etc., compresses the amount of image information, has a fast registration...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 李振华徐胜男江耿红
Owner SHANDONG UNIV
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