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Method and device for identifying multiple touch points

A multi-touch point and recognition method technology, applied in the field of computer vision, can solve the problems affecting the operator's experience effect and inconvenient use, achieve good user experience effect, avoid cost increase, and have good application prospects

Inactive Publication Date: 2011-08-24
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, using the above method, the operator often needs to frequently click these function buttons to switch between different use states, so it is very inconvenient to use and affects the experience of the operator

Method used

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  • Method and device for identifying multiple touch points
  • Method and device for identifying multiple touch points
  • Method and device for identifying multiple touch points

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Embodiment Construction

[0027] The present invention provides a multi-touch point recognition method and device, which can solve the problem that different types of touch objects cannot be correctly identified in the prior art, and when there are multiple touch objects of the same type, it is necessary to add an auxiliary camera to correctly locate them. The problem of increased hardware cost and design difficulty, the following describes the embodiment of the present invention in detail with reference to the drawings when there are two touch points on the flat screen.

[0028] A multi-touch point recognition method, such as figure 2 shown, including the following steps:

[0029] In step S1, the two cameras collect one frame of images respectively, and respectively obtain the shape information of the touch object images in the two images.

[0030] In this embodiment, the two cameras are respectively installed at the lower left corner and the lower right corner of the flat screen, and both adopt 90°...

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Abstract

The invention provides a method and a device for identifying multiple touch points. The method comprises the following steps of: acquiring a frame image by two cameras respectively, and acquiring shape, position and transverse size information of touch object images in the two images; judging whether the types of the touch objects are the same according to the shape information; if the types are different, identifying pen touch and finger touch, and calculating touch point coordinates of a pen and a finger respectively; if the types are the same, calculating the angle between each touch object and the connecting line of the two cameras and crossing point coordinates of all connecting lines according to the position information; calculating the approximate distance between the touch objects and the cameras and the approximate position coordinates according to the transverse size information; and verifying the crossing point coordinates and the approximate position coordinates to find out a real touch point. By using the method and the device, the touch objects of different types can be accurately identified, and the problems of cost increment and design difficulty increment caused by increasing the auxiliary camera are effectively avoided when multiple touch points of the same type are positioned.

Description

technical field [0001] The invention relates to the field of computer vision, in particular to a multi-touch point recognition method and device based on camera positioning. Background technique [0002] In recent years, large-scale liquid crystal displays have been widely used in the large-scale human-computer interaction display industry. The touch technology of the flat panel includes infrared LED scanning positioning and ultrasonic positioning, and the use of two cameras installed at the corners of the screen, and the use of optical path cross positioning, etc. Among them, the positioning method with two cameras installed at the corners of the screen has gradually been widely used due to its high positioning accuracy and ability to quickly capture and calculate the coordinates of touch points. [0003] Such as figure 1 As shown, taking the flat-panel display as an example, camera A and camera B are respectively installed on the two corners of the flat-panel display. Whe...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 郑金发
Owner GUANGDONG VTRON TECH CO LTD
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