Image registering method based on optical flow field

An optical flow field and image technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as low accuracy, interference, and monotonous manual registration methods

Inactive Publication Date: 2014-11-19
HARBIN DIANSHI SIMULATION SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Image registration methods can be broadly divided into manual registration and automatic registration. The manual registration method is monotonous, human interference is inevitable, and the accuracy rate is low.

Method used

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  • Image registering method based on optical flow field
  • Image registering method based on optical flow field
  • Image registering method based on optical flow field

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Embodiment Construction

[0062] This embodiment combines Figure 1-6 The present invention is described in detail:

[0063] 1. First calculate the optical flow field between images. The process of this method is as follows: The differential optical flow algorithm based on the first-order space-time gradient boils down to finding the solution of the following equation

[0064] (1)

[0065] In the formula, for point on point image edge direction of flow velocity, for the image sequence shorthand for The image of the moment is at the point the brightness at for at point edge The partial derivative of the direction, is the smoothness of the flow velocity described by the flow velocity gradient on the image plane, In order to control the weight of smoothness, the flow velocity solution in the form of relaxation iteration can be obtained at last

[0066] (2)

[0067] (3)

[0068] are respectively for estimated value. Consider updating charac...

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Abstract

The invention discloses an automatic and accurate image registering method based on analysis on an optical flow field. The method is characterized in that image registering is divided into background registering and object registering, wherein background registering is completed by calculating the global optical flow field; and the object registering is realized via matching algorithms from coarse to fine levels, characteristic-point sets of two frames of images to be registered are extracted, transformation parameters of a moving object is calculated in a least square method, and thus, the moving object is registered.

Description

technical field [0001] The present invention is related to computer vision, image understanding and computer graphics. With the wide application of video streams, it is necessary to realize the registration between images in the image sequence, especially the registration problem between images in the case of camera movement. The invention relates to an image registration method based on optical flow field, which effectively solves the registration problem of camera motion and large moving target. Background technique [0002] Image registration is the process of finding the best match between pixels corresponding to the same physical area in two images, in camera correction, multi-sensor data fusion, remote sensing image splicing, moving target tracking and In many applications such as the analysis of medical images, image registration is an unavoidable and important problem. [0003] Image registration methods can be broadly divided into manual registration and aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 张泽旭
Owner HARBIN DIANSHI SIMULATION SCI & TECH
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