Method for automatically detecting touch object by camera and application thereof

Abstract

The invention discloses a method for automatically detecting a touch object by a camera, which comprises the following steps of: firstly accumulating capture image line gray values and finding out the minimum or the maximum of accumulated sums; then determining image acquisition areas; and finally making comparison of the accumulated sums of gray values of each column of images taken respectively when the touch object exists and when no touch object exists so as to realize the auto detection on the touch object. The method has the advantages of little operand, quick response speed and the like compared with the prior art.

Description

technical field [0001] The invention relates to touch object detection technology, in particular to a camera automatic detection touch object method and its application. Background technique [0002] In the prior art, a combination of infrared scanning and camera positioning is often used to realize multi-touch. The hardware implementation structure of this method is as follows figure 1 As shown, 101 and 102 are shooting auxiliary bars adopted by the camera, and their function is to highlight the touch object in the captured image, and help to detect and locate the touch object in the image. 103 is a camera module, including a camera and a micro-processing chip, the camera can be a CMOS camera or a CCD camera, and the micro-processing chip can be a single-chip microcomputer, an ARM chip or a DSP chip, for reading and analyzing image data. 104 and 105 are receiving modules for infrared scanning, and 106 and 107 are transmitting modules for infrared scanning. The receiving m...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method of detecting touch objects is: it is easy to misjudge the touch position area originally belonging to the same continuous area as two touch areas, and it is impossible to accurately detect the touch object; The response speed is slow, which does not meet people's increasing requirements for touch response speed

For example, in terms of touch writing, if the response speed cannot keep up, it will cause the operator to finish writing, but the handwriting cannot keep up.

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