Expansion target stable trace point extraction method

Abstract

The invention discloses an expansion target stable trace point extraction method which comprises the following steps of: firstly, recovering the expansion target successfully identified by early association into a binary image; then, performing contour tracing to obtain the contour point array arranged in order; smoothing the target contour by use of a method based on chord-arc ratio filtering, removing the sharp arc section on the target contour, and linearly connecting two endpoints of the removed arc section to form a new closed contour after filtering; calculating the head direction of the target by combining the target motion direction and the main shaft direction, and then obtaining the forefront point in the head direction of the target; and calculating the centroid in the local round area as a trace point by taking the forefront point as the center. Through the method, the finally calculated target trace point is stable and reliable, severe shake is avoided, the tracing stability is improved, and the risk of tracing loss is reduced.

Description

technical field [0001] The invention belongs to the field of image processing, and relates to a method for extracting a target tracking point, in particular to a method for extracting a stable tracking point of an extended target based on the smoothness of the chord-arc ratio profile. Background technique [0002] With the development of optical imaging tracking requirements, the stable tracking of targets, especially the stable tracking of extended targets, is becoming more and more urgent. When the distance between the target and the imaging and tracking equipment is relatively close, the target presents the characteristics of an extended target, occupying 1 / 3 of the field of view or even filling the field of view. As far as the extraction position of target tracking points is concerned, the original tracking method based on centroid and centroid is no longer suitable for tracking extended targets, which can easily lead to segmentation failure and loss of targets. At this...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method for extracting tracking points based on chord-arc ratio contour smoothness and target head stability, which solves the problem of easy sliding or severe shaking of tracking points in the original method when tracking extended targets, resulting in tracking loss question

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