Auricle defect measurement method based on optical three-dimensional measurement

Abstract

The invention belongs to the technical field of image processing and discloses an auricle defect measurement method based on optical three-dimensional measurement. The method comprises the steps as follows: complete point cloud data of auricles on two sides of a test object are acquired with a structured light three-dimensional measurement method; the measured point cloud data are spliced and point cloud is unified under one three-dimensional coordinate system; the spliced auricle point cloud is segmented under the three-dimensional coordinate system, and complete auricles are segmented from the point cloud data; the segmented point cloud data are projected to a plane for establishment of outer contours, point cloud projection areas are acquired, and the maximum point cloud projection areas are obtained through iterative optimization; the maximum projection areas of the auricles on two sides of the test object are divided, and the auricle defect ratio is obtained. The structured lightthree-dimensional measurement technology is introduced into the auricle defect identification field in the method, a high-speed three-dimensional measurement technology and a data processing method proposed for auricle defect identification are combined, and automation of the auricle defect measurement method is realized.

Description

technical field [0001] The invention belongs to the technical field of image processing, and more particularly relates to an auricle defect measurement method based on optical three-dimensional measurement. Background technique [0002] In forensic clinical diagnosis, identification of auricle defect disability grade is an important and common item. The percentage of auricle area defect is the main basis for the grade of auricle disability and defect. In clinical identification, forensic doctors often use the ratio of the largest projected area of ​​the affected side to the healthy side of the auricle as the value of the defect percentage. [0003] The following two methods are often used in forensic clinics to measure the proportion of auricle defects: (1) thin film tracing method; (2) photographic pixel method. The film tracing method covers the auricle with a square transparent film, manually traces the contour of the auricle, and estimates the area of ​​the auricle by c...

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Problems solved by technology

[0004] These two methods are widely used in clinical identification because of their simplicity and ease of use, but because they are mainly manual operations, the consistency is poor, and the camera shooting results have nonlinear distortion of the lens, and the results are not convenient for electronic filing. Therefore, there is a need for a more accurate and automated method to measure auricle defects

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