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Location system of video finger and location method based on finger tip marking

A positioning method and technology of a positioning system, applied in radio wave measurement systems, using re-radiation, etc., can solve the problems of inflexible finger movement, high price, complex structure, etc., and achieve simplified input equipment, low cost, and low price Effect

Inactive Publication Date: 2007-09-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0005] Although the combination of tracking equipment and data gloves can accurately obtain the position and attitude information of the fingers, it also has its shortcomings: ①The structure of the device itself is complex, which makes the movement of the user's fingers inflexible after wearing; ②In order to achieve high precision, The use of sophisticated sensor devices makes the overall price expensive and difficult to maintain; ③Data gloves use inflation, vibration or electrical stimulation to compress and stimulate the skin to achieve tactile feedback, and only simulate the most basic touch sensation

Method used

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  • Location system of video finger and location method based on finger tip marking
  • Location system of video finger and location method based on finger tip marking
  • Location system of video finger and location method based on finger tip marking

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Embodiment Construction

[0039] First, the system configuration block diagram shown in Figure 1 is used for system layout, and several cameras are used for hand monitoring. Afterwards, as shown in the working principle block diagram in Figure 2, the image acquisition device converts the video analog input into an image digital signal, and completes the identification and positioning of the fingertip through the computer.

[0040] The specific process of positioning is shown in the flow chart of Figure 3:

[0041] (1) Initial stage

[0042] Through the calibration method based on the two-dimensional plane target, the ordinary rectangle is used as the calibration reference object to determine the f of each camera u , f v , u 0 , v 0 , s these 5 parameters (where u 0 , v 0 is the principal point coordinates, f u is the scale factor of the u axis of the image, f v is the scale factor of the v-axis of the image, s is the distortion factor), and the internal parameter matrix K is obtained:

[0043]...

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Abstract

This invention relates to a kind of video finger positioning system and its orient method which base on finger tip labeled, belongs to virtual reality systemic man-computer interaction technology. This invention includes camera, image picking equipment and calculator. Locating method includes initialization and positioning. Initialization is a calibrating method of via two-dimensional surface mark target, to definite interior parameter of each camera; through camera global calibrating, to definite each camera coordinate relative to one unified world coordinate translation and turning; the positioning stage adopt self-adapting focusing distance, via detecting picture mark point to realize finger locating.

Description

(1) Technical field [0001] The video finger positioning system and positioning method based on fingertip markers according to the present invention belong to a video-based data processing device and technology, and are applicable to the human-computer interaction link of a virtual reality system. (2) Background technology [0002] Interaction technology is one of the key technologies of virtual reality system, which realizes the interaction between human and computer, real world and virtual world. To achieve interaction, it is necessary to obtain the real-time position and orientation information of the user, especially the user's body (hand) in some time reference frame (moment). [0003] In the field of human-computer interaction, hand tracking is mainly divided into two methods: data glove tracking and video tracking. [0004] See "Shi Jiaoying, "Basics and Practical Algorithms of Virtual Reality", Science Press, 2002", which comprehensively expounds the relevant content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/36
Inventor 顾宏斌朱为珏孙瑾
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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