System for tracking visual positions on basis of infrared projection mark points

Abstract

The invention discloses a system for tracking visual positions on the basis of infrared projection mark points. An infrared source is used by the system to project a main mark point image onto a specified region through a mark point negative provided with the preset main mark point pattern. Since the image projected by the system is an infrared image, the image, the same as the invisible mark points, has the advantages of high power, high light intensity, easier identification, stable positions and the like; the shape of the main mark point image depends on the main mark point pattern on the mark point negative, all you need to do for replacing the shape of the main mark point is maintain the mark point negative, so that the operations of both installation and maintenance are convenient; and furthermore, in order to meet the requirements for large-scale tracking and registration, at least four auxiliary mark points are projected onto the periphery of the main mark point, so that the auxiliary mark points can help positioning and tracking when the infrared image acquisition device is moved to lead part or all of the main mark point to be moved out of the acquisition area.

Description

technical field [0001] The invention relates to visual position tracking technology, in particular to a visual position tracking system based on infrared projection marker points. Background technique [0002] Augmented reality technology is an application technology that combines real scenes with computer-generated virtual scenes in real time. The key lies in being able to superimpose virtual images in a set manner at the correct position, and the core of realization lies in high-precision tracking and positioning technology. [0003] In the large-scale augmented reality system, the target object is the working object of the large-scale tracking system. In the registration system based on computer vision tracking, the tracking and positioning of the specified target is realized by identifying the marker points. Marking points can be divided into natural marking points and artificial marking points according to the production method. The recognition of natural landmarks is...

AI Technical Summary

Problems solved by technology

The disadvantage is that the reflective material will absorb part of the light energy, making the brightness of the mark point less than that of the active light-emitting mark point; secondly, the non-mark point objects will also reflect part of the infrared light when illuminated by the infrared light source, which is a kind of interference to the mark point

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