Digital ink producing method and system for laser pen

Abstract

The invention is a method and system for producing the digital ink of a laser pen, adopting a camera to capture the laser beam the laser pen emits on a projection screen, then storing these track patterns of laser beam in a mode of digital ink and inserting the track patterns in a projecting document, and finally real-timely displaying the obtained digital ink on the projection screen. The hardware of the invention comprises laser pen, camera, computer, projector and projection screen. The invention adopts a computer visual technique to detect, locate, track and obtain the tracks and shapes of the laser beam on the projection screen, adopts a document analysis algorithm and a digital ink technique to further make accurate location and shape decoration on these tracks and shapes and converts them into digital ink to insert them in the projecting document in a color transparent mode. The system can record these tracks for a long time and also store these tracks in the projecting document.

Description

Technical field [0001] The present invention relates to a digital ink generation method and generation system (10) of a laser pen, which adopts a camera (11), uses computer vision technology to capture the laser beam emitted by the laser pen on a projection screen, and then takes the form of digital ink Save the trajectories of these laser beams and embed them in the documents used for projection, and finally display the resulting digital ink on the projection screen in real time. Background technique [0002] Laser pointers play a very important role in electronic lectures, multimedia teaching and other activities. In order to emphasize the main points and key content, the user does not need to interrupt the computer to perform the corresponding mouse and keyboard operations when giving a speech freely; only need to use the laser pointer and use the laser to circle the corresponding area on the projection. Regrettably, in actual use, the laser trajectories of those circled point...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome this problem, the general processing method is to circle the content that needs to be emphasized in the document in advance. However, this cannot achieve the effect of on-site emphasis; another method is to use a computer pen on a specific medium (computer handwriting) However, the speaker can only operate and explain while operating next to a specific medium, which limits the speaker's activities and cannot give full play to the effect of free speech on the spot

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