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Optical flow field calculation method

A calculation method and optical flow field technology, applied in the field of image processing, can solve the problems of many iterations, low efficiency, long calculation time, etc.

Inactive Publication Date: 2015-12-09
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

However, the traditional optical flow field calculation method has a large number of iterations, a long calculation time, and low efficiency.

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Embodiment Construction

[0030] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0031] The invention proposes an optical flow field calculation method under the basic constraint equation and the global smoothness constraint condition. On the basis of the traditional differential algorithm, the mean value is calculated by using the 4-neighborhood template When calculating the mean value of the optical flow field of a certain pixel, the new values ​​of its lower and left neighbors in the current iteration have been calculated. When calculating the mean value of the optical flow of a pixel, the calculated new value can be used. Accelerate the convergence speed of the algorithm.

[0032] The principle of the differential method is simple, it is relatively easy to implement, high in efficiency, and the calculation result is qui...

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Abstract

The invention discloses an optical flow field calculation method. According to the method, current new iteration values of light streams in a lower neighborhood and a left neighborhood of a pixel point are already obtained when a light stream mean value of the pixel point is calculated through a four-neighborhood template, so that current iteration light streams of the pixel point can be obtained with the new value according to the calculated light stream mean value during calculation of the light stream mean value of the point. Through adoption of the method, errors are small, and the convergence speed of an algorithm is increased. The method is particularly suitable for situations with a large quantity of boundaries and large boundary gray scale gradients; the iteration times can be reduced greatly; and the iteration time is shortened. Compared with a conventional differential method, the method has the advantages of very high robustness, great shortening of the optical flow field calculation time, and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a fast optical flow calculation method. Background technique [0002] The optical flow field refers to a two-dimensional (2D) instantaneous velocity field composed of all pixels in the image, where the two-dimensional velocity vector is the projection of the three-dimensional velocity vector of the visible points in the scene on the imaging surface. Therefore, optical flow not only contains the motion information of the observed object, but also contains rich information about the three-dimensional structure of the scene. The study of optical flow has become an important part of computer vision and related research fields. Because optical flow plays an important role in computer vision, it has very important applications in target object segmentation, recognition, tracking, robot navigation, and shape information recovery. Restoring the 3D structure and mot...

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Application Information

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IPC IPC(8): G06T15/00
Inventor 余学才余瑞华程小龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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