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A Spherical Video Image Correction Method

A technology of video image and correction method, which is applied in the field of video processing, can solve the problems of cumbersome video image correction process, etc., and achieve the effects of real-time correction processing, enhanced reusability, maintainability and compatibility

Active Publication Date: 2021-03-02
CHENGDU CHENGDIAN GUANGXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the video image correction process of this method is cumbersome. First, image acquisition is required before correction, that is, the image projected by each projector is taken by a digital camera, and then the acquired image is processed and matrix transformation calculation is performed. The processing also includes the acquisition of the correction grid and the acquisition of feature points, and the matrix transformation also includes the calculation of the effective display area and the calculation of the mapping matrix

Method used

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Experimental program
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Effect test

Embodiment 1

[0044] see figure 1 , a spherical video image correction method, comprising the following steps:

[0045] a. Set the LED lamp beads along the spherical longitude and latitude on the inner surface to form a display surface, and divide it into multiple display channels along the longitude direction, the pole area is divided into separate display channels along the latitude line, and the spherical display surface is divided into side channels and top or bottom. channel, determine the display field angle parameters of each channel according to the diameter of the display sphere and the position of the eye point;

[0046] b. The video image generation device generates a multi-channel rectangular graphic according to the display angle of view parameter, and synchronously outputs it to the back-end graphic corrector for geometric correction of the graphic from the plane to the spherical surface;

[0047] c. The graphic corrector converts each channel image generated by the video ima...

Embodiment 2

[0052] see figure 1 , a spherical video image correction method, comprising the following steps:

[0053] a. Set the LED lamp beads along the spherical longitude and latitude on the inner surface to form a display surface, and divide it into multiple display channels along the longitude direction, the pole area is divided into separate display channels along the latitude line, and the spherical display surface is divided into side channels and top or bottom. channel, determine the display field angle parameters of each channel according to the diameter of the display sphere and the position of the eye point;

[0054] b. The video image generation device generates a multi-channel rectangular graphic according to the display angle of view parameter, and synchronously outputs it to the back-end graphic corrector for geometric correction of the graphic from the plane to the spherical surface;

[0055] c. The graphic corrector converts each channel image generated by the video ima...

Embodiment 3

[0069] see figure 1 , a spherical video image correction method, comprising the following steps:

[0070] a. Set the LED lamp beads along the spherical longitude and latitude on the inner surface to form a display surface, and divide it into multiple display channels along the longitude direction, the pole area is divided into separate display channels along the latitude line, and the spherical display surface is divided into side channels and top or bottom. channel, determine the display field angle parameters of each channel according to the diameter of the display sphere and the position of the eye point;

[0071] b. The video image generation device generates a multi-channel rectangular graphic according to the display angle of view parameter, and synchronously outputs it to the back-end graphic corrector for geometric correction of the graphic from the plane to the spherical surface;

[0072] c. The graphic corrector converts each channel image generated by the video ima...

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Abstract

The invention discloses a method for correcting a spherical video image, which belongs to the technical field of video processing, and is characterized in that it comprises the following steps: a. determining the display field angle parameters of each channel; b. generating multi-channel rectangular graphics and synchronously outputting them Perform geometric correction of graphics from plane to spherical surface for the back-end graphics corrector; c. The graphics corrector converts each channel image into a curved image; d. The graphics correction parameters are stored in FLASH; e. The projector model converts the pre-deformed image Projected onto a hemispherical projection screen for presenting real target images. The present invention can realize the geometric transformation from a plane image to a spherical image by loading the parameters on the hardware, without the need for image acquisition, correction grid and feature point acquisition, and calculation of limited display area; fully utilizing the effective pixels of the video image, realizing the video The real-time correction processing of the image enhances the reusability of parameters between channels and avoids secondary correction for later maintenance.

Description

technical field [0001] The invention relates to the technical field of video processing, in particular to a spherical video image correction method. Background technique [0002] The immersive dome display adopts projection display technology, and the dome display function is realized by means of image splicing and fusion through multiple projectors. Because once an observer or object is inside the system, it will block part of the display area; on the other hand, this display method requires image stitching and image fusion in addition to image geometric correction. Due to the large stitching and fusion area, The actual pixel utilization of each projector is very small. [0003] In order to solve the problems of small field of view, low contrast, short life, high price and difficult maintenance of projectors, the LED dome screen display scheme was proposed, which has high refresh rate, high definition, large field of view, Because of the advantages of long life, easy main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00H04N9/31
CPCG06T5/006H04N9/3185
Inventor 解军王继岷贺卫东曾一雄王万勤
Owner CHENGDU CHENGDIAN GUANGXIN TECH
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