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Corresponding point searching method of active shape model and terminal equipment

A technology of active shape model and shape model, which is applied in the field of image processing and can solve the problem of not clearly specifying the search direction, etc.

Inactive Publication Date: 2012-11-14
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the original algorithm does not clearly specify the search direction, when searching for the corresponding point of P, it is easy to cause A or C to be the corresponding point of P (mismatch)

Method used

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  • Corresponding point searching method of active shape model and terminal equipment
  • Corresponding point searching method of active shape model and terminal equipment
  • Corresponding point searching method of active shape model and terminal equipment

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Embodiment Construction

[0076] Embodiments of the present invention provide a method for searching corresponding points of an active shape model and a terminal device. Mark points of the model contour are generated according to parameters of the shape model, the mark points are divided into multiple groups, and a group is assigned to each mark point. number; determine the normal direction of the contour curve at each marked point; search for the most matching feature point in the image along the normal direction corresponding to each marked point, and the searched feature point is the corresponding point of the marked point. In this way, in the process of searching for corresponding points, the direction of feature extraction of corresponding points is clarified by grouping information, which increases the reliability of searching for corresponding points of the active shape model.

[0077] like Figure 5 As shown, the corresponding point search method of the active shape model provided by the embodi...

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Abstract

The invention provides a corresponding point searching method of an active shape model and terminal equipment. The method comprises the following steps of: generating marking points of the model outline according to parameters of the shape model; dividing the marking points into a plurality of groups; assigning one group number to each marking point; determining the normal direction of an outlinecurve at each marking point; searching the most matched character point in an image in the normal direction corresponding to each marking point, and using the character points as the corresponding points of the marking points. Thereby, in the process for searching the corresponding points, the character extraction direction of the corresponding point can be determined through the grouping information, and the reliability of the corresponding point searching can be improved. Then, the multi-dimensional searching process of the corresponding points can be realized through the dimensional information of the outline, and the reliability and the stability are improved. In addition, the matching algorithm is improved by using the main ingredient analysis method, the matching speed is accelerated, and the reliability is improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for searching corresponding points of an active shape model and a terminal device. Background technique [0002] The shape of the active shape model is represented by a landmark. A landmark is an artificially specified point for shape description. Sequentially connecting the landmarks can draw a contour shape, such as the contour of a human hand, head, etc. , can be drawn with several marker points. [0003] The active shape model is built on the basis of a large number of training shape samples. The actual operation process is to first collect point sets of many sample contours by manual methods, and construct a shape model based on this point set. The active shape model is modeled by principal component analysis. An active shape model mainly consists of two parts: 1) the template profile, and 2) the shape parameters. Assume Represents the contour of an N ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/60G06K9/64
Inventor 刘志军
Owner TCL CORPORATION
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