Image correction method and system for camera array, and medium
A camera array and image correction technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve problems such as insufficient precision, weakened jitter, and jittery perception, and achieve the effects of improving efficiency, reducing constraints, and saving material resources
Inactive Publication Date: 2020-06-05
PLEX VR DIGITAL TECH CO LTD
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[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 work due to insufficient precision, and at the same time Extremely labor-intensive; if electronic pan / tilt and other devices are used, it will consume considerable material resources
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[0061] The present invention will be further described now in conjunction with accompanying drawing.
[0062] 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.
[0063] 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:
[0064]
[0065] 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;
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The invention relates to the field of computer image processing, and discloses an image correction method and device for a camera array, and a medium, and the method comprises the steps: calibrating the internal and external parameters of a camera; estimating a linear center of the camera array as an array center, and estimating a normal direction of a camera plane; 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, homographytransformation 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 isin 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 an image correction method, system and medium of a camera array. 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 ...
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IPC IPC(8): G06T7/80G06T5/00
CPCG06T7/80G06T5/80
Inventor 章焱舜张迎梁
Owner PLEX VR DIGITAL TECH CO LTD