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Method for splicing and fusing image in multi-projection display system

A display system and image stitching technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as surface projection deformation, and achieve the effect of ensuring integrity, increasing layering, and increasing size

Inactive Publication Date: 2013-01-16
吉林禹硕动漫游戏科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the gap will become very small after adjustment, for professional users, such a gap is unacceptable
Moreover, many channel large screens are not flat, but cylindrical ring screens or ball screens, which will cause projection deformation on the curved surface

Method used

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  • Method for splicing and fusing image in multi-projection display system
  • Method for splicing and fusing image in multi-projection display system
  • Method for splicing and fusing image in multi-projection display system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] figure 1 : The hardware platform for splicing and fusion of BPCA multi-projection based on wavelet change, one PC corresponds to one camera, one projector and one projection screen.

[0021] figure 2 : The image sequence is obtained by the camera, and the obtained image sequence is preprocessed. The present invention performs histogram equalization on the original image sequence such as image 3 As shown, it will be found that the gray scale range of the image is expanded or the gray scale distribution is uniform, thereby increasing the contrast, making the image details clear, and achieving the purpose of enhancement. Step 100 performs wavelet transformation on the image. With the increase of wavelet decomposition levels, the dimensionality of the image vector is greatly reduced. The low-frequency sub-bands after wavelet decomposition are extracted to perform bl...

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Abstract

The invention discloses a method for splicing and fusing images in a multi-projection display system and relates to a method for processing images. The method comprises the following steps: preprocessing an image sequence; geometrically calibrating; spatially splicing images; carrying out preprocessing by using wavelet transform; extracting features; and extracting features of adjacent images and fusing the images. With the adoption of the method, an overlapped part of the images can be eliminated, the sizes of the images are increased, the completeness of frames are guaranteed to a large extent, the revealed image resolution is increased, the projection distance is shortened, and the layering of the frames is increased. The invention provides a registering algorithm which can be used for matching rapidly and stably based on feature points so as to carry out the projection splicing and fusion, so that the method is applicable to various screen types.

Description

technical field [0001] The invention relates to an image processing method. Background technique [0002] The rapid development of virtual reality technology in recent years has pushed projection splicing and fusion technology to the forefront of technology. However, although the traditional single ordinary projector is cheap, its resolution is low and cannot meet people's needs. High-end optical projection Projectors are expensive and cannot be used in common applications, so splicing and fusion technology based on multiple projectors emerged as the times require, which not only solves the price problem, but also improves the resolution. At present, large-screen projection generally has the problem of geometric edge mismatch and inconsistency between projector projection areas. This is because large screens are usually spliced ​​by projection images projected by multiple projectors. Since each projector is independent of each other in a multi-channel projection display sys...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T5/40
Inventor 郑立国朱妹丽王青青
Owner 吉林禹硕动漫游戏科技股份有限公司
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