OCR (optical character recognition)-based intelligent graphic hand-drawing method, device and equipment for electronic whiteboard

An electronic whiteboard and graphics technology, applied in image data processing, drawing from basic elements, electronic digital data processing, etc., can solve problems such as high threshold, complicated implementation, and insufficient user experience, and achieve low threshold and improve user experience. Effect

Pending Publication Date: 2022-06-03
长沙朗源电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the user wants to draw a triangle during the writing mode, the mode needs to be switched, the user experience is not smooth enough, and there are certain limitations in use
[0005] Choose the solution to integrate OpenCV: developers need to have a certain grasp of OpenCV, and the implementation is more complicated and the threshold is higher

Method used

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  • OCR (optical character recognition)-based intelligent graphic hand-drawing method, device and equipment for electronic whiteboard
  • OCR (optical character recognition)-based intelligent graphic hand-drawing method, device and equipment for electronic whiteboard
  • OCR (optical character recognition)-based intelligent graphic hand-drawing method, device and equipment for electronic whiteboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides an OCR-based intelligent hand-drawn graphic method for an electronic whiteboard, including the following steps: S1 hand-drawn handwriting recognition: when starting hand-drawing, after the screen receives an ACTION_DOWN touch event, it starts recording the X-axis and Y-axis of the touch event Coordinate data, within a certain period of time after the ACTION_UP event raises the hand, if there is no subsequent ACTION_DOWN touch event incoming, it means that the hand-painting is completed, stop recording, and transfer the recorded coordinate data to the OCR text recognition SDK to obtain the hand-painting the returned literal result;

[0048] S2 test summary: If the returned text result is a text symbol model similar to a specific graphic, it can be judged that the user hand-painted the specific graphic;

[0049] S3: Perform specific graphic correction drawing.

[0050] On the one hand, the present embodiment provides an OCR-based electronic white...

Embodiment 2

[0055] as attached figure 1 As shown, this embodiment provides an OCR-based intelligent hand-drawn graphic method for an electronic whiteboard, including the following steps: hand-drawn handwriting recognition, when starting to hand-draw, after the screen receives the ACTION_DOWN touch event, starts recording the X-axis of the touch event, Y-axis coordinate data, within a certain period of time after the ACTION_UP event raises the hand, if there is no subsequent ACTION_DOWN touch event incoming, it means that the hand-painting is completed, stop recording, and pass the recorded coordinate data to the OCR text recognition SDK, get all the Describe the text results returned by hand-drawing; after many tests and summaries, if the returned text results are "▲", "A" and other text symbol models similar to triangles, it can be judged that the user's hand-painted is a triangle;

[0056] Corrected drawing of the triangle: according to the maximum vertex coordinates in the four directi...

Embodiment 3

[0069] as attached figure 2 As shown in the figure, this embodiment provides an OCR-based intelligent hand-drawn graphic method for an electronic whiteboard, including the following steps: when starting hand-drawing, after the screen receives the ACTION_DOWN touch event, it starts to record the X-axis and Y-axis coordinate data of the touch event. , within a certain period of time after the ACTION_UP event raises the hand, if there is no subsequent ACTION_DOWN touch event incoming, it means that the hand-painting is completed, the recording is stopped, and the recorded coordinate data is sent to the OCR text recognition SDK to get the hand-painted return. text result;

[0070] After many tests and summaries, if the returned text result is a text symbol model similar to a rectangle, such as "mouth", "■", "said", "day", etc., it can be judged that the user's hand-painted rectangle is a rectangle;

[0071] According to the maximum vertex coordinates in the four directions of th...

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Abstract

The invention belongs to the technical field of electronic whiteboards, and discloses an OCR-based electronic whiteboard intelligent graph hand-drawing method, device and equipment, and the method comprises the following steps: hand-drawn handwriting recognition and test summarization: judging a specific graph hand-drawn by a user; and carrying out specific graph correction drawing. According to the technical scheme, graph recognition is carried out on the hand-drawn handwriting through OCR character recognition, then the intelligent hand-drawn graph is drawn through the correction algorithm, the implementation threshold is low, the intelligent operation feeling can be brought to a user, and the user experience is improved.

Description

technical field [0001] The invention belongs to the technical field of electronic whiteboards, and in particular relates to an OCR-based intelligent hand-drawn graphic method, device and equipment for electronic whiteboards. Background technique [0002] OpenCV refers to a cross-platform computer vision and machine learning software library based on BSD license (open source); OCR refers to optical character recognition; RectF refers to a "painting-related tool class" commonly used in Android, which is often used to describe rectangle / Square, realizes the concept of a "rectangle", which supports higher-precision values; MotionEvent refers to a class of Android native screen touch events, which can record the type of events (including ACTION_DOWN press, ACTION_MOVE move, ACTION_UP lift, etc.) And touch the XY axis coordinate position and so on. [0003] At present, there are mainly two graphics drawing schemes for electronic whiteboards, one of which is to select a graphic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/04883G06T11/20G06V30/20
CPCG06F3/04883G06T11/203
Inventor 罗文郑泽龙袁建波
Owner 长沙朗源电子科技有限公司
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