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Finger identification method used in interactive demonstration system

A demonstration system and recognition method technology, applied in the direction of user/computer interaction input/output, character and pattern recognition, educational equipment, etc., can solve the problems of fixed camera position and high cost, and achieve reduced quantity dependence and simple interaction Effect

Inactive Publication Date: 2011-09-28
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the disadvantage of this technology is that the user's finger must be in contact with the whiteboard or white wall to determine the operation, and at least three cameras need to be placed near the whiteboard or white wall to use this technology. The fixed position of the camera and the high cost are its defects.

Method used

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  • Finger identification method used in interactive demonstration system
  • Finger identification method used in interactive demonstration system
  • Finger identification method used in interactive demonstration system

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Embodiment Construction

[0032] In order to better understand the technical solution of the present invention, the following specific examples are used for further description. The following examples are not intended to limit the present invention.

[0033] In an interactive presentation system based on camera-projection, it is very important to recognize the position and behavior of the user's finger during drawing and other operations. The present invention realizes a method for recognizing the user's finger purely based on image processing without additional equipment.

[0034] 1. Blur the original image to remove noise

[0035] In the interactive system based on camera-projection, the picture of the interactive area captured by the camera is often distorted due to camera parameters and other reasons (hereinafter referred to as the original picture), that is, it is different from the real environment in terms of chromaticity, etc. Noise will be generated at this time; in addition, due to the speci...

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Abstract

The invention relates to a finger identification method used in an interactive demonstration system, which is used for determining the operation behavior of a user by means of the identification of fingers on the basis of the camera-projection interactive demonstration system. Based on image processing techniques, the fingers are identified according to the characteristics of finger gesture of a user at the time of drawing by taking geometrically positional information of the finger as main information for identification to analyze and process the images taken by a camera. The entire identification process is completely based on the analysis and the processing of the images without the need that a user wears an additional apparatus for positioning and identifying the finger, thus solving the problems of a plurality of inconveniences owing to the additional apparatus and the like and enhancing the interactivity and human-based property of the interactive demonstration system.

Description

technical field [0001] The invention relates to a finger recognition method used in an interactive demonstration system, which is used for determining user's operation behavior through finger recognition in an interactive demonstration system based on camera-projection. The invention belongs to the technical field of computer vision. Background technique [0002] Interactive presentation systems are more and more widely used in daily work, life and social activities, especially in information transmission such as teaching and business presentations, which greatly improve the interaction between users and the efficiency of information transmission. The interactive presentation system uses an electronic whiteboard or an ordinary whiteboard (white wall) as the information presentation medium. Users can directly write on the whiteboard, draw pictures, or control computer programs on the whiteboard with their hands or other auxiliary tools. [0003] At present, the mainstream di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/01G09B5/02G06K9/00
Inventor 王兆光言西南张乎兴管海兵梁阿磊
Owner SHANGHAI JIAO TONG UNIV
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