Visual projection calibration method and device

A projection and visual technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of prone to human error, time-consuming and laborious

Active Publication Date: 2020-02-07
苏州明兆光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, it is necessary to provide a technical solution for visual projection calibration to solve the problems that the existing visual projection calibration method is time-consuming and labor-intensive and prone to human error

Method used

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  • Visual projection calibration method and device

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Embodiment Construction

[0032] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0033] see figure 1 , is a flowchart of a method for visual projection calibration according to an embodiment of the present invention. A method for visual projection calibration, the method comprising:

[0034] First enter step S1: acquire image information.

[0035] The image information can be imported by the user through manual shooting, or can be collected by a special image acquisition device, which is an electronic device with an image acquisition function, such as a network camera. The acquired image information includes the touch area and the display area, and is used to further find out the coordinate mapping relationship between the two areas.

[0036] Then enter step S2: identify the touch area and the display area acco...

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Abstract

The invention provides a visual projection calibration method and a device. The method comprises the following steps: S1, acquiring image information; S2, identifying a touch area, a display area, a first reference point corresponding to the touch area and a second reference point corresponding to the display area according to the image information; S3, virtualizing a plurality of target points onthe identified display area, and respectively calculating input coordinates of each target point relative to the first reference point and output coordinates of each target point relative to the second reference point; S4, importing the input coordinates and the output coordinates corresponding to the target points into a preset training model to obtain calibration parameters corresponding to thecurrent touch area and the display area; and S5, calibrating the coordinate points on the touch area and the display area according to the calibration parameters. By the adoption of the method, automatic calibration of the coordinate points of the touch area and the display area can be achieved without manual clicking, calibration errors are effectively reduced, and calibration accuracy is improved.

Description

technical field [0001] The invention relates to the field of touch products, in particular to a method and device for visual projection calibration. Background technique [0002] With the development of science and technology and the progress of society, interactive projection products have been widely used. At present, in the application scenarios of interactive projection products (such as electronic whiteboards, touch walls, etc.), touch calibration must be performed manually before use to determine the reporting performance of TP (Touch Panel, touch panel) Accurately map to the corresponding projection screen (that is, the display area). The specific method is to manually click multiple marking points in the projection screen with a finger or a stylus, and record the relative points of these target points relative to the touch reference point and projection reference. The position of the point, and then use machine learning technology to find the parameter set of the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0418
Inventor 蔡宗华叶映志周文国
Owner 苏州明兆光电科技有限公司
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