Equipment positioning method and device applied to large display screen or projection screen

Abstract

The invention discloses an equipment positioning method applied to a display screen or a projection screen. The equipment positioning method comprises the steps that a digital watermark image block isembedded into an image on a display screen, positioning equipment (e.g., a handwriting pen) with a camera is used to snapshoot the image block containing a digital watermark, watermark detection processing is performed on the image, therefore, the position of the handwriting pen is determined, a motion trail of the positioning equipment can be obtained through multiple positioning points, and then a handwriting input function is achieved. The method has the advantages that positioning resolution is high, the influence on picture quality is small, the handwriting input function can be directlyachieved on the display screen in a large size without a touch medium, realization operability is high, cost is low compared with a common touch screen, and high economic value is obtained.

Description

technical field [0001] The invention relates to an equipment positioning method and device applied to large display screens or projection screens. Background technique [0002] Handwriting input has become an important way of computer input, and one of the most important technologies involved in handwriting input is device positioning technology. There are many forms of display screen positioning technology currently used, but two types of technology are the main ones. One type of positioning method needs to realize the positioning of the handwriting device through the touch medium or attaching other devices on the display screen, so as to realize the handwriting input function, including infrared touch technology, capacitive touch technology, resistive touch technology, LED dot matrix screen detection technology, etc. This kind of technology is relatively mature and easy to implement, but the cost is high, so this kind of handwriting input and positioning technology is mo...

AI Technical Summary

Problems solved by technology

The disadvantage of this patent is that it requires the use of two-dimensional code coordinate paper, which cannot directly realize device positioning and handwriting input on display devices such as televisions.

The disadvantage of this patent is that the resolution is limited, it can only determine which line the light pen is on the document, it cannot be freely positioned like a mouse, and it cannot be directly applied to large display screens

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