Method, device and system for geometric correction assistance of projected image

A technology for geometric correction and projected images, applied in the field of image processing, can solve the problems of inability to widely use various types of projection screens, large correction errors, imperfect image splicing and fusion, etc., to achieve precise target orientation, good compatibility, Debugging convenient effects

Active Publication Date: 2014-06-25
北京淳德电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operator will spend a lot of time to determine the parameters, and the images of each projector cannot be perfectly spliced ​​and blended
[0008] At present, some of the existing geometric correction methods cannot be widely applied to various types of projection screens, some have large correction errors, some have long correction time and complex parameters, and lack a convenient and widely applicable to various curved surface shapes. A Geometric Correction Method for Angle Projection

Method used

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  • Method, device and system for geometric correction assistance of projected image
  • Method, device and system for geometric correction assistance of projected image
  • Method, device and system for geometric correction assistance of projected image

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Embodiment 1

[0034] This embodiment discloses an auxiliary method for geometric correction of projected images.

[0035] Such as figure 1 As shown, the auxiliary method for geometric correction of projected images disclosed in this embodiment mainly includes:

[0036] Step S1. Determine two sets of position comparison points according to the film source and projection properties of the corresponding projection screen. The first set of position comparison points are distributed on the film source, the second set of position comparison points are distributed on the projection screen, and the The position attributes of the first group of position comparison points and the second group of position comparison points are consistent.

[0037] In this step, optionally, the above-mentioned projection screen may be a spherical screen, a dome screen, a spherical screen or an ellipsoidal screen. Among them, the relationship between spheres, spheroids and ellipsoids is described in detail as follows:...

Embodiment 2

[0080] Corresponding to the method disclosed in the above-mentioned embodiment, this embodiment discloses an auxiliary device for geometric correction of projected images to execute the above-mentioned method flow; the unclear points and related terms of this embodiment can be explained with reference to the above-mentioned first embodiment .

[0081] Such as Figure 6 As shown, the auxiliary device for geometric correction of projected images disclosed in this embodiment at least includes: a first processing module 61, which is used to determine two sets of position comparison points according to the film source and projection properties of the corresponding projection screen, the first set of position comparison points The alignment points are distributed on the film source, the second group of position comparison points are distributed on the projection screen, and the position attributes of the first group of position comparison points and the second group of position comp...

Embodiment 3

[0095] Corresponding to the above-mentioned method and device embodiments, this embodiment discloses a geometric correction system for projected images; the unclear points and related terms of this embodiment can be explained with reference to the first and second embodiments above.

[0096] Such as Figure 7 As shown, the system includes a fusion processor 71 and the geometric correction auxiliary device 72 described in the second embodiment above. in:

[0097] The geometric correction auxiliary device is used to determine two sets of position comparison points according to the film source and projection properties of the corresponding projection screen, the first set of position comparison points are distributed on the film source, and the second set of position comparison points are distributed on the projection screen , and the position attributes of the first group of position comparison points are consistent with the position attributes of the second group of position c...

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Abstract

The invention discloses a method, device and system for geometric correction assistance of a projected image. The method, device and system are used for improving the convenience of correction. The method for geometric correction assistance comprises the steps that two sets of position comparison points are determined according to a film source corresponding to a projection curtain and the projection attribute, the first set of position comparison points are distributed on the film source, the second set of position comparison points are distributed on the projection curtain, and the position attribute of the first set of position comparison points and the position attribute of the second set of position comparison points are consistent; a reference coordinate system is created and a first coordinate of each position comparison point in the first set of position comparison points in the reference coordinate system is determined; a second coordinate, set by a user, of each position comparison point in the second set of position comparison points in the reference coordinate system is input; the image is corrected according to the mapping relationship of the first coordinates and the second coordinates of the relevant position comparison points in the first set and the second set of the position comparison points.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an auxiliary method, device and system for geometric correction of projected images. Background technique [0002] Projectors are widely used in command centers, video conference rooms, multimedia multi-function halls, etc. In order to achieve different projection effects, projection screens are divided into plane, cylinder, spherical and other types. Due to the limitation of the location of the projector and the influence of the curved shape of the projection screen, the image projected by the projector on the projection screen will be deformed to varying degrees. Therefore, it is necessary to perform geometric correction on the source image, so that the corrected image can display a regular effect on the projection screen. In image fusion processing, geometric correction usually includes not only correcting the irregular images on the projection screens of ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31H04N5/74
Inventor 孙怀义宋良多王少华
Owner 北京淳德电子有限公司
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