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Handwriting Systems and Operation Methods Thereof

a handwriting system and handwriting technology, applied in the field of touch technology, can solve the problems of inconvenient inconvenient user operation of the conventional handwriting system, and inability to recognize the sensed object correctly

Inactive Publication Date: 2013-06-27
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a handwriting system that is not affected by the background light source and has an adjustable operation zone. The system analyzes the shape of the light spot in the image and filters out the background noise, making it easier to recognize the objectives. The system calculates the position of a single or multiple objects based on the image characteristics and imaging position of the light spots. The transform matrix operation allows for a seamless mapping of the predetermined operation zone to the indicated operation zone, regardless of the operational environment. Overall, the handwriting system provides accurate and reliable performance in different settings.

Problems solved by technology

In the sensing technique of a conventional handwriting system (e.g., a virtual handwriting pad), the sensed objects may not be recognized correctly due to the background light source interference resulted from the varying of operational environments.
In addition, because the operational environment (e.g., a table's top surface) may vary, the predetermined operation zone (i.e., a virtual input zone) of the conventional handwriting system may not be always convenient for users.
For example, users may feel inconvenient to operate the conventional handwriting system if the table's top surface (specifically, the predetermined operation zone) associated with the handwriting system is disorder.

Method used

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  • Handwriting Systems and Operation Methods Thereof
  • Handwriting Systems and Operation Methods Thereof
  • Handwriting Systems and Operation Methods Thereof

Examples

Experimental program
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first embodiment

of the Present Invention

[0026]FIG. 1 is a schematic view illustrating a handwriting system in accordance with an embodiment of the present invention. As shown, the handwriting system in this embodiment includes a light source module 104, an image sensing apparatus 106 and a processing circuit 108; wherein the processing circuit 108 is electrically connected to the image sensing apparatus 106. The light source module 104 is configured to provide a light source for illuminating an object 102 on a plane 110. In this embodiment, the plane 110 has a parallelogram shape, and preferably has a rectangle shape. The plane 110 can be a virtual plane, which is defined by software installed in the processing circuit 108 or defined by specific objects (not shown) disposed at the four corners thereof. Specifically, the plane 110 is parallel to the optical axes of the image sensing apparatus 106.

[0027]In this embodiment, the image sensing apparatus 106 is disposed on the light source module 104; an...

second embodiment

the Present Invention

[0038]The handwriting system in accordance with the second embodiment of the present invention will be described in the following still with a reference of FIG. 1, due to having a hardware structure similar to that of the handwriting system in accordance with the first embodiment.

[0039]Please refer to FIGS. 1, again. The main difference between the first and second embodiments of the present invention is the operation process of the processing circuit 108. Beside receiving the image captured by the image sensing apparatus 106, the processing circuit 108 in this embodiment is further configured to calculate, if the captured image has a single light spot therein, the position of a single object 102 respective to the plane 110 according to the image characteristics and imaging position of the single light spot in the captured image; or calculate, if the captured image has a plurality of light spots therein, the positions of a plurality of objects 102 respective to ...

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Abstract

A handwriting system includes a light source module, an image sensing apparatus and a processing circuit. The light source module is configured to provide a light source to illuminate an object on a plane. The image sensing apparatus is disposed on the plane and configured to capture an image of the object reflecting the light source. The processing circuit is electrically connected to the image sensing apparatus and configured to receive the image captured by the image sensing apparatus, analyze the shape of each of light spot(s) in the captured image and filter out the light spot(s) not qualified to the shape of the object. Another handwriting system and two handwriting system operation methods are also provided.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the touch technique field, and more particularly to handwriting systems and operation methods thereof.BACKGROUND OF THE INVENTION[0002]In the sensing technique of a conventional handwriting system (e.g., a virtual handwriting pad), the sensed objects may not be recognized correctly due to the background light source interference resulted from the varying of operational environments. In other words, the conventional handwriting system may have a performance easily affected by the background light.[0003]In addition, because the operational environment (e.g., a table's top surface) may vary, the predetermined operation zone (i.e., a virtual input zone) of the conventional handwriting system may not be always convenient for users. For example, users may feel inconvenient to operate the conventional handwriting system if the table's top surface (specifically, the predetermined operation zone) associated with the handwriting sys...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F3/045
CPCG06F3/045G06F3/0425G06F3/04883
Inventor CHENG, HAN-PINGYANG, SHU-SIAN
Owner PIXART IMAGING INC