Method and device for detecting image touch points
A detection method and touch point technology, applied in the field of image processing, can solve the problems of touch point detection, difficult to remove, affecting the touch point positioning accuracy, etc., and achieve the effects of fast processing speed, improved positioning accuracy, and simple operation.
Inactive Publication Date: 2011-04-20
GUANGDONG VTRON TECH CO LTD
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A schematic diagram of an image captured by a camera of the prior art is shown as figure 2 As shown, it is difficult to remove it only through binarization processing, and its existence has a serious impact on the detection of touch points, which in turn affects the positioning accuracy of touch points
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[0033] A device for detecting an image touch point, the device comprising:
[0034] The image conversion unit is used to convert the original image taken by the infrared camera into a grayscale image and save it, and at the same time blur the grayscale image, and send the grayscale image before blurring processing and the grayscale image after blurring processing to image removal unit;
[0035] An image removal unit, configured to subtract the grayscale image before the blurring process from the grayscale image after the blurring process and send it to the image processing unit;
[0036] An image processing unit, configured to perform denoising processing and binarization processing on the subtracted image in the image removing unit.
[0037] like image 3 Shown, the detection method of a kind of image touch point of the present invention comprises the following steps:
[0038] (1) Convert the original image taken by the infrared camera into a grayscale image, and save the ...
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The invention discloses a method for detecting image touch points, which comprises the following steps: (1) converting an original image shot by infrared camera into a grey-scale image and storing the grey-scale image; (2) performing the obfuscation of the grey-scale image in the step (1); (3) subtracting the grey-scale image subjected to the obfuscation in the step (2) from the grey-scale image in the step (1); (4) subjecting an image obtained after the subtraction in the step (3) to de-noising; and (5) subjecting an image obtained after the de-noising in the step (4) to binaryzation to obtain a final touch point image. The invention also provides a device for detecting image touch points, which comprises an image conversion unit, an image removal unit and an image processing unit. The method and the device can effectively eliminate the interference of non-touch points in the image such as a palm shape, precisely detect the touch points in the image and improve positioning precision. Meanwhile, the method and the device have the advantages of simple calculation, high processing speed and the like.
Description
technical field [0001] The present invention relates to the field of image processing, in particular to a method and device for detecting an image touch point. Background technique [0002] In the prior art, such as figure 1 The shown method realizes multi-point touch, which emits infrared light through the infrared diode 103, and projects the infrared light evenly onto the entire touch panel 102 through the reflector 106. material. When a finger is put into the touch panel to touch, the infrared light is diffusely reflected on the finger, and is captured by the infrared camera 104 placed under the touch panel 102. After image processing, the touch point data is extracted, and then transmitted to the touch point by the projector 105. projected onto the projection screen 101. [0003] The principle is that the infrared rays are diffusely reflected on the finger, captured by the camera and identified. However, since the infrared rays emitted by the diodes are reflected by ...
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IPC IPC(8): G06T5/00G06F3/042
Inventor 方武平钟杰婷
Owner GUANGDONG VTRON TECH CO LTD