Real-time video image coordinate recognition system and method

A technology of image coordinates and real-time video, applied in character and pattern recognition, instruments, electrical digital data processing, etc., can solve the problems of insufficient positioning accuracy and large positioning error, and achieve good anti-noise performance and high recognition rate.

Inactive Publication Date: 2011-10-19
SHANGHAI TIANPAI WIRELESS TECH
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Problems solved by technology

However, the coordinate recognition of video images in the prior art usually has the problem of insufficient positioning accuracy and large positioning errors, so that subsequent interactive operations cannot be performed accurately and effectively

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  • Real-time video image coordinate recognition system and method
  • Real-time video image coordinate recognition system and method
  • Real-time video image coordinate recognition system and method

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Embodiment Construction

[0054] The present invention will be described in more detail below in conjunction with the accompanying drawings.

[0055] figure 1 It is a schematic diagram of the use scene of the system of the present invention. Wherein the video acquisition processing module is the core part of the present invention, which can capture the image on the projection screen and the position of the tip of the pen used by the user, that is, the feature position. At the same time, the video acquisition and processing module converts the above position information into mouse information, so that the projection screen becomes a large "touch screen" or "interactive whiteboard", and users can draw, write, click, etc. on the projection screen. In addition, the system also has the ability to track multiple feature points, enabling advanced functions such as multi-touch.

[0056] The hardware architecture of the system of the present invention will be introduced in detail below. Such as figure 2As ...

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Abstract

The invention relates to a real-time video image coordinate recognition system and a real-time video image coordinate recognition method. The system comprises an image sensor, a field programmable gate array (FPGA) embedded system, a synchronous dynamic random access memory (SDRAM) and a universal serial bus (USB) controller. Real-time coordinate recognition and interactive operations over digital video images are realized by a series of work comprising real-time video acquisition, video analysis, characteristic point capturing, characteristic point position coordinate transformation, computer communication and the like. The system and the method have the advantages of high positioning accuracy, low positioning error of less than 2.5mm, low power consumption, low cost, small volume, convenience of carrying and the like.

Description

technical field [0001] The present application relates to an image coordinate recognition system and its method, in particular, to an FPGA-based real-time video image coordinate recognition system and its method, which can perform interactive projection positioning. Background technique [0002] With the continuous development of multimedia technology, real-time processing of video images is required, as well as synchronous coordinate recognition and positioning, and then some interactive operations. Therefore, some related processing systems came into being. The more common interactive projection positioning mainly has the following methods: [0003] (1) Ultrasonic positioning [0004] This is based on the echo triangulation technology for positioning. This technology is less difficult to implement, but the accuracy is relatively poor, usually with an error of 1 to 5 cm, and it is easily interfered by other objects on the reflection plane, so fewer products are used. [...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042G06K9/60
Inventor 高俊华徐睿国海欣彭超然屠斌杰
Owner SHANGHAI TIANPAI WIRELESS TECH
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