Multi-channel correction splicing method for curved screen

A multi-channel, curved surface technology, applied in image data processing, instruments, calculations, etc., can solve problems such as accuracy loss, and achieve the effect of increasing surface accuracy, improving measurement stability, and high measurement accuracy

Active Publication Date: 2020-04-24
北京东方瑞丰航空技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Loss of accuracy during deformation

Method used

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  • Multi-channel correction splicing method for curved screen
  • Multi-channel correction splicing method for curved screen
  • Multi-channel correction splicing method for curved screen

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Experimental program
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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] The present invention is oriented to the method of multi-channel correction mosaic of curved surface screen, such as figure 1 As shown, the specific steps are as follows:

[0046] Step 1: According to the 3D model of the curved screen, the parameters of the curved screen are measured by the 3D software.

[0047] The surface curtain is parameterized according to the 3D model, and common surface configurations such as spherical curtain and column curtain can simplify the analytical representation

[0048] The simplified analytical expression of the three-digit representation formula of the ball screen is:

[0049] (x-x 0 ) 2 +(y-y 0 ) 2 +(z-z 0 ) 2 = r 2 (1)

[0050] In the formula, (x 0 ,y 0 ,z 0 ) is the center of the sphere, r is the radius;

[0051] The simplified analytical expression of the three-digit expression formula of the column ...

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PUM

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Abstract

The invention discloses a multi-channel correction splicing method for a curved screen, and the method comprises the following steps: firstly obtaining the parameters of the curved screen, measuring the positions and posture parameters of all projectors relative to the curved screen, and unifying a coordinate system; then constructing a virtual scene containing a virtual curved screen and a virtual projector, calculating a picture deformation relationship when a projector picture is projected to the dome screen, and obtaining a projection transformation relationship; and finally, constructingan interpolation grid in a screen space of the projector; obtaining the interpolation grids required by fine adjustment of the screen space of each projector through the above mode; then, performing fine tuning and forming a fine tuning transformation parameter table; integrating two-dimensional mapping tables obtained by projection transformation and micro-calibration transformation; rendering the picture by using the geometric correction parameters to obtain a pre-deformed picture projected by each projector; and finally, projecting a pre-deformed picture by the projector to finish splicingcorrection. According to the invention, only one-time initial calibration is needed, and part of measurement errors, construction errors, settlement errors caused by overlong service life of equipmentand the like are solved through micro calibration.

Description

technical field [0001] The present invention is designed in the field of virtual reality technology, specifically a method for multi-channel calibration and splicing of curved screens. Background technique [0002] With the development of virtual reality technology, more and more engineering projects use virtual reality technology as a display scheme. The large-scale projection screen can be watched by many people at the same time, and has a strong sense of immersion, which is very suitable for the display of large-scale virtual reality projects. Large-scale projection screens are widely used in flight training, 3D experience halls, on-site advertising promotion and other industries. [0003] According to the appearance of the projection screen, the projection screen can be divided into a flat projection screen and a curved projection screen. The manufacturing technology of the flat projection screen is mature, and the manufacturing cost and the use cost have a great cost ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T5/00
CPCG06T3/4038G06T5/006Y02T90/00
Inventor 文泽蔡向群宋中华
Owner 北京东方瑞丰航空技术有限公司
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