A Fast Phase Unwrapping Method Based on Mass Map Region Segmentation

Abstract

The invention belongs to the technical field of computer measurement, and particularly relates to a rapid phase unwrapping method based on quality diagram region segmentation. The rapid phase unwrapping method includes the steps of capturing wrapped phase diagrams obtained through processing with a camera, calculating quality diagrams according to the wrapped phase diagrams, filtering the quality diagrams with a phase differential-difference algorithm, automatically obtaining a region segmentation threshold value, dividing the wrapped phase diagrams into regions with different priorities with the obtained region segmentation threshold value, completing region phase unwrapping with a simple path tracking phase unwrapping algorithm, conducting phase unwrapping, and combining sets after phase unwrapping according to the priority sequence from high to low. By means of the rapid phase unwrapping method, the simple path tracking phase unwrapping algorithm based on region segmentation is adopted, and the phase unwrapping speed can be quickened on the premise that the phase unwrapping accuracy is not reduced to the greatest extent. By means of the rapid phase unwrapping method, the requirements for high accuracy, rapid unwrapping, noise jamming resistance and the like of structured light vision three-dimensional measurement are met.

Description

technical field [0001] The invention belongs to the technical field of computer measurement, and in particular relates to a fast phase unwrapping method based on mass map area division. Background technique [0002] Structured light vision measurement is a new method for measuring the three-dimensional surface shape of objects. It has been widely used in industrial inspection, virtual reality, cultural relics protection and medical engineering in recent years due to its characteristics of non-contact, convenience, speed and high precision. Applications. A structured light vision measurement system generally consists of a projection device, a camera, and an image processing system. The principle of structured light vision measurement is to project one or more encoding patterns onto the measurement scene, capture the projected image of the scene with a camera, and then use triangulation to obtain depth information by matching the corresponding points of the projection pattern...

AI Technical Summary

Problems solved by technology

However, in practical applications, phase unwrapping is a path-dependent difficult problem due to partial shadowing, low fringe modulation quality, irregular surface brightness, edge discontinuity and undersampling, etc., which often appear in the obtained fringe pattern.

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