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Optical touch system

A technology for optical touch control and information control. It is used in instruments, electrical digital data processing, and input/output processes of data processing. It can solve the problems of slow response, time-consuming and resource-consuming optical touch systems.

Inactive Publication Date: 2013-04-03
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a lot of time and resources to calculate and output the coordinates of multiple targets, and it will also cause the optical touch system to respond slowly

Method used

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Examples

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Embodiment Construction

[0065] An optical touch system according to an embodiment of the present invention compares the number of pixel clusters generated by an object in an image with a predetermined number of pixel clusters to determine whether a multi-touch operation is being performed. If a single target is operated, the number of pixel clusters will be the same as the predetermined number of pixel clusters. At this time, the optical touch system calculates the target coordinates based on the acquired image; if multiple targets are operated, the number of pixel clusters will be greater than the predetermined number of pixel clusters. At this time, the optical touch system will output gesture information correspondingly according to the position change or the number change of the pixel clusters generated by the acquired multiple images.

[0066] The optical touch system may include at least one image sensor for detecting at least one object. The optical touch system can also include a processor, t...

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Abstract

The invention discloses an optical touch system which comprises an image sensor and a processor, wherein at least one target is detected by the image sensor; the processor is coupled with the image sensor; and the processor is used for analyzing the quantity of pixel clusters generated by the at least one target in an image generated by the image sensor and generating gesture information when the quantity of the pixel clusters is more than the preset quantity of the pixel clusters.

Description

technical field [0001] The present invention relates to an optical touch system, and in particular to a gesture detection method and an optical touch system using the gesture detection method. Background technique [0002] In the optical touch system, the image sensor acquires the image of the target, and the touch system then analyzes the position of the target image in the image, and then calculates the coordinates of the target according to the position of the target image and some geometric dimensions of the optical touch system. [0003] US Patent No. 4,782,328 discloses an optical touch screen system comprising two sensors and a processor, wherein the processor is coupled to the two sensors. Two sensors are used to acquire images of objects on the touch screen area. The processor analyzes the images generated by the two sensors to determine the sensing paths respectively connecting the target and the two sensors. The processor calculates the position coordinates of t...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 苏宗敏柯怡贤林育佳林志新
Owner PIXART IMAGING INC