Projection Surface Touch Recognition System and Method

Abstract

The invention provides a touch identification system and method for a projection area. The system comprises a projection device, a touch monitoring device and a touch judgment device, wherein the projection device is used for projecting one projection picture; the touch monitoring device is positioned on a first position and is used for detecting whether a touch event is in the presence in the visual angle range of a corresponding projection picture or not; when the touch event is in the presence, the touch monitoring device records a position where the touch event is in the presence, and notifies a projection device; the projection device projects a feature sign on the suspected touch position on the projection picture, wherein the suspected touch position corresponds to the mapping of aposition where the touch event is in the presence under the visual angle of the touch monitoring device; and the touch judgment device is positioned on a second position different from the first position and is used for judging whether the suspected touch position where the feature sign under the visual angle of the touch monitoring device is the same with the position where the touch event is inthe presence or not, and if the suspected touch position is the same with the position where the touch event is in the presence, the touch judgment device judges that the touch event is in the presence on the projection picture.

Description

technical field [0001] The invention relates to the field of human-computer interaction on a projection surface, in particular to a touch recognition system and method for a projection surface. Background technique [0002] With the popularization of smart phones, touch control has become the most accustomed operation method for the public. At present, in addition to smartphones, large-scale screens or projection screens also hope to have touch functions, but the current touch functions will have certain limitations. For example, optical projectors or touch screens need to be able to actively emit light. The touch function can only be used with a stylus. If you want to use a stylus, you must configure a laser curtain on the projection surface to help determine whether a touch event has occurred, which causes inconvenience in installation or use. [0003] At the same time, there is currently no universal or efficient method for judging whether a large-size projection surface...

AI Technical Summary

Problems solved by technology

However, the laser pointer needs to be equipped with a battery, and it cannot be used once it is out of power, and it is also impossible to perform touch operations without using the laser pointer

Although the use of a laser projection screen can avoid the inconvenience of using a laser pointer, the laser screen needs to be installed and adjusted in advance. Without the installation and level adjustment of the hardware in advance, the touch function cannot be used normally.

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