Method for Accurate Drawing of Object's Omni-directional Contour

Abstract

The invention discloses an accurate drawing method for an omnidirectional object contour, and belongs to the fields of image displaying and processing. The accurate drawing method comprises the following steps: exporting three-dimensional coordinates of various nodes of a stereoscopic model; recording viewing angle parameters; generating an orthographic projection contour layer; erecting the object and calculating the three-dimensional contour of the object; carrying out viewing angle conversion and calculating the projection contour; merging self-intersected polygons and simplifying the internal structure of the contour; judging an occlusion relation and deleting overlapping shadows; and carrying out smooth processing. The accurate drawing method for the omnidirectional object contour is simple in algorithm and short in elapsed time; the extracted object contour is small in deformation; the contour drawing effect for an irregular object is good; overlapping can also be eliminated; and the overall extraction effect is improved by smooth processing on the contour. The accurate drawing method for the omnidirectional object contour not only can be applied to a reality enhancement technology, but also can be applied to a virtual simulation system and a GIS.

Description

technical field [0001] The invention relates to the field of image display and processing, in particular to a method for accurately drawing an all-round contour of an object. Background technique [0002] Augmented reality is a technology that uses computers to synthesize virtual elements (including text, images, videos, etc.) It is superimposed with virtual scenes or objects to create a space that combines virtual and real, which is completely different from the previous human perception experience, resulting in a deeper human-computer interaction experience, which is more likely to change people's perception of the existing world process and form. [0003] In a virtual scene, the accurate extraction of object shape has an important influence on object contour extraction and related trigger events. At present, the artificial contour drawing method is generally adopted in the industry, mainly including image recognition method, contour projector algorithm and so on. Among...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the stereo vision method is that it is difficult to find the corresponding points, the algorithm is complex, and it takes a long time, and the outline of the extracted object has a large deformation and serious aliasing. What is more critical is that when the orientation changes, the shape changes completely, so manual Drawing contours in multiple directions, inefficient

In addition, the existing method for drawing object outlines in augmented reality still has the problem of poor overall effect caused by irregular object outlines and the problem of overlapping object outlines

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