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Image correction method and system for camera ring array, and medium

A ring-shaped array, image correction technology, applied in image enhancement, image analysis, image data processing and other directions, to achieve the effect of saving material resources, saving manpower and high precision

Inactive Publication Date: 2020-01-31
PLEX VR DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems, the present invention aims to provide an image correction method, system and medium for an annular array of cameras

Method used

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  • Image correction method and system for camera ring array, and medium
  • Image correction method and system for camera ring array, and medium
  • Image correction method and system for camera ring array, and medium

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Embodiment Construction

[0051] The present invention will be further described now in conjunction with accompanying drawing.

[0052] see figure 1 , figure 1 What is shown is an embodiment of the present invention. The method of this embodiment only needs to correct the image by calibrating the camera parameters and estimating the homography transformation of each camera picture, so that the shake effect of the ring camera sequence can be significantly weakened.

[0053] First, calibrate the intrinsic and extrinsic parameters of the camera. Among them, the camera internal reference at least needs to calibrate the focal length of the camera (f x ,f y ) and principal point coordinates (c x ,c y ), and thus define the internal parameter matrix K of the camera:

[0054]

[0055] The external parameter of the camera is a rigid body transformation from the world coordinate system to the camera coordinate system, which is composed of a rotation transformation and a translation transformation;

[0...

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PUM

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Abstract

The invention discloses an image correction method and a device for a camera annular array, and a medium. The method comprises the steps of calibrating internal and external parameters of a camera; calculating the array center, calculating the linear center of each camera and the normal direction of the camera plane, projecting the camera positions and the linear centers to the camera plane, and enabling the quadratic sum of the differences between the distances of all the cameras projected to the circle center and the radius of the circle to be minimum; projecting the linear center to the axis of the camera circle to obtain a final array center; performing camera rotation correction and internal reference correction according to the array center; and calculating a homography matrix according to the parameters before and after correction. According to the method, homography transformation is carried out on the picture, so that camera parameters corresponding to the picture weaken camera orientation and jitter of the image in the horizontal direction; the focal length is in direct proportion to the distance to the center of the array, so that the imaging sizes of objects in the center of the array are consistent, and the imaging size jitter is weakened.

Description

technical field [0001] The invention relates to the field of computer image processing, in particular to a camera ring array image correction method, system and medium. Background technique [0002] A circular camera array is a widely used camera array. The most well-known application is shooting bullet time (Bullet time) special effects; bullet time is a special effect that uses computer-aided photography technology to simulate variable speed in movies, TV or computer games. [0003] However, if the image sequence captured by the array is directly synthesized into a video, there will be obvious jitter in the perception, which cannot be directly used as a special effect; even if you try to weaken the jitter by manually adjusting the camera parameters, it is often difficult to be effective due to insufficient precision. Extremely labor-intensive; if devices such as electronic pan / tilts are used, material resources are quite consumed. Contents of the invention [0004] In o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/80
CPCG06T7/80G06T5/00
Inventor 章焱舜张迎梁
Owner PLEX VR DIGITAL TECH CO LTD