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Boundary tracking method and device

A boundary tracking and boundary point technology, applied in the field of image processing, can solve problems such as inaccurate boundary tracking results and heavy workload

Active Publication Date: 2016-05-04
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the crawler method, the boundary tracking results may be inaccurate in some cases, so it is often necessary to select more starting points and repeat the scan, resulting in a heavy workload

Method used

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  • Boundary tracking method and device

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Embodiment Construction

[0065] Images can be divided into target regions and background regions. Typically, the target region includes the key information of the image. Determining the boundary of the target area is the premise of image recognition, which plays an important role in further image processing such as feature description, recognition and understanding.

[0066] The boundary tracking technology refers to tracking the boundary points of the target area in the image in a certain order, for example, in a clockwise or counterclockwise order.

[0067] like figure 1 The shown crawler method (also known as worm random method) is a common boundary tracking technique. However, due to the crawler method, the boundary tracking results may be inaccurate in some cases, such as some convex parts on the target area (such as figure 1 The convex part shown in the lower right corner) may be detoured, so that the boundary points tracked in sequence cannot accurately reflect the boundary of the target are...

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Abstract

The invention provides a boundary tracking method and device. The method comprises the steps of: extracting a boundary point set; selecting a first seed point from the boundary point set; looping a first tracking step until a first ending condition is met, wherein the first tracking step comprises finding a pixel point meeting a first target condition in an adjacent area of the first seed point, using the pixel point as a first target point and using the first target point as an updated first seed point, the first target condition includes that the point belongs to the boundary point set and is not used as the first target point in the first tracking step executed before, and the first ending condition includes that no pixel point meeting the first target condition is found in the adjacent area of the first seed point; and using the successively found first target points or first seed points as boundary points, tracked in sequence, of a first target area. According to the invention, the boundary point set is firstly extracted, then boundary tracking is carried out according to the boundary point set, and repeated scanning is not needed, so that the workload is reduced.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a boundary tracking method and device. Background technique [0002] Boundary tracking technology is a commonly used image segmentation technology, which is used to sequentially track the boundary points of the target area in the image. At present, boundary tracking technology has been widely used in the fields of lesion analysis and quantitative metallographic analysis of medical images. [0003] Crawling is a common boundary tracking technique such as figure 1 As shown, the implementation process of the crawler method is: take a pixel point close to the boundary of the target area as the starting point, start scanning from the starting point, and the scanning step is one pixel point. area, the scanning direction turns to the left, and if it enters the background area from the target area, the scanning direction turns to the right until the scanning returns to the starting poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 周楹君韩冬马锐兵
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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