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Image correction method, device, device and computer-readable storage medium

An image correction and image technology, applied in the field of image processing, can solve problems such as inconvenient reading and image distortion, and achieve the effect of improving readability

Active Publication Date: 2020-03-10
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking pictures manually will affect the quality of the class, but if you set up an automatic camera to take pictures automatically, the collected images will be distorted and inconvenient to read

Method used

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  • Image correction method, device, device and computer-readable storage medium
  • Image correction method, device, device and computer-readable storage medium
  • Image correction method, device, device and computer-readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] figure 1 It is a flow chart of the image correction method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation where distortion correction is performed on an image captured by a camera containing blackboard content. The method can be executed by an image correction device, and specifically includes the following steps 110 to 140.

[0031] Step 110, in response to a trigger instruction, acquire a target image of a writing board displaying a standard image through a camera, wherein the standard image includes a plurality of markers, and is projected onto the writing board by a projector to realize the display on the writing board. display on the tablet;

[0032] Wherein, the target image of the writing board is obtained through the camera, that is, the image taken by the camera facing the writing board is as follows Figure 2a As shown in , since the camera is facing the writing board, it can capture all the content displaye...

Embodiment 2

[0061] image 3 It is a flow chart of the image correction method provided by Embodiment 2 of the present invention. This embodiment is applicable to the case of performing distortion correction on an image captured by a camera containing blackboard content, and the method can be executed by an image correction device. The difference between this embodiment and Embodiment 1 is that Embodiment 1 uses coordinate mapping parameters or conversion functions to record the coordinate mapping relationship between the image displayed on the tablet and the image captured by the camera, and this embodiment records in the form of a list The coordinate mapping relationship. The image correction method provided in this embodiment includes:

[0062] Step 310, in response to the trigger instruction, acquire the target image of the writing board displaying a standard image through the camera, wherein the standard image includes a plurality of markers, and is projected onto the writing board b...

Embodiment 3

[0072] Figure 4 It is a schematic structural diagram of an image correction device provided in Embodiment 3 of the present invention, and the device includes:

[0073] The photographing module 410 is configured to, in response to a trigger instruction, acquire a target image of a writing board displaying a standard image through a camera; wherein, the standard image includes a plurality of markers, and is projected onto the writing board by a projector to realize displayed on said tablet;

[0074] An acquisition module 420, configured to acquire first coordinates according to a preset algorithm; wherein, the first coordinates are the coordinates of the marker in the target image;

[0075] The mapping module 430 is configured to obtain a coordinate mapping relationship between the image displayed on the tablet and the image captured by the camera according to the second coordinate and the first coordinate; wherein the second coordinate is the identification The coordinates o...

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PUM

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Abstract

An image correction method, comprising: obtaining a target image of a writing board displaying a standard image by means of a video camera in response to a trigger instruction (110); obtaining a first coordinate according to a preset algorithm, wherein the first coordinate is a coordinate of a marker in the target image (120); obtaining, according to a second coordinate and the first coordinate, a coordinate mapping relation between the image displayed on the writing board and an image obtained by the video camera, wherein the second coordinate is a coordinate of the marker in the standard image (130); and correcting the image obtained by the video camera as a blackboard-writing image according to the coordinate mapping relation after confirming that the image obtained by the video camera contains the writing board displaying a blackboard-writing image (140). Accordingly, also disclosed are an image correction apparatus and device, and a computer readable storage medium. The problem that the image distortion occurs in automatic capture of the blackboard-writing image to affect reading is solved, and the readability of the captured image can be improved.

Description

technical field [0001] The present invention relates to image processing technology, in particular to an image correction method, device, equipment and computer-readable storage medium. Background technique [0002] Writing on the blackboard on the electronic whiteboard provided by the touch screen terminal has the advantages of no dust, effortless writing and easy erasure, so the electronic whiteboard is gradually popularized in the teaching classroom. But it cannot replace the traditional blackboard, because the electronic whiteboard cannot restore some details such as strokes, which may lead to poor viewing effect of the saved blackboard writing, especially for some courses that need to restore handwriting details, such as art, calligraphy, etc. Moreover, the interference of auxiliary educational equipment (such as a settable, etc.) cannot be ruled out. For example, when using a settable to measure on a blackboard, the touch screen will misjudge the settable as blackboard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80H04N9/31
CPCG06T7/80H04N9/3179H04N9/3185
Inventor 杨铭
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD