A Method of Panoramic Electronic Image Stabilization Based on Spherical Projection
A technology of electronic image stabilization and spherical projection, which is used in TV, electrical components, color TV, etc., and can solve problems such as inability to accurately locate the overall movement.
Inactive Publication Date: 2017-09-05
CHANGCHUN UNIV OF SCI & TECH
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[0005] The purpose of the present invention is to provide a panoramic electronic image stabilization method based on spherical projection, which is a combination of spherical image mapping / expansion based on Gaussian projection and Euler angle solution based on SFM algorithm. The spherical projection method of the panoramic image adopted effectively solves the coordinate transformation between the panoramic imaging plane and the spherical surface; and, in this technology, the coordinate system of each camera in the panoramic camera system is unified into one coordinate system, which effectively solves the problems caused by The problem that each camera in the panoramic camera system cannot accurately locate the overall movement due to different movement changes
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[0105] Such as figure 1 As shown in Fig. 1, first establish the outline of the 3D spherical model, then calibrate the panoramic camera, obtain the corresponding internal reference matrix and distortion coefficient, and then correct the distortion of the panoramic image. The rectified image is mapped onto the surface of the sphere by Gaussian projection. By matching the image of each frame with the set reference frame, the rotation matrix relative to the reference frame is solved, and the Euler angle is obtained by solving the rotation matrix. Finally, the effect of image stabilization is achieved by rotating the 3D spherical model in reverse to the angle obtained above.
[0106] Step 1, panoramic image stabilization preprocessing stage.
[0107] (1a) Refer to figure 2 , use the functions provided by OpenGL to draw a sphere, and establish a 3D sphere model based on the earth coordinate system. The coordinates of a point p on the sphere are expressed as (L, B), where L repre...
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The invention relates to a panoramic electronic image stabilization method based on spherical projection, which is characterized in that the electronic image stabilization implementation steps are as follows: panoramic electronic image stabilization preprocessing, spherical image mapping and expansion based on Gaussian projection, Euler angle based on SFM algorithm, Rotate the 3D spherical space to achieve the image stabilization effect. This method is a combination of spherical image mapping / expansion based on Gaussian projection and Euler angle solution based on SFM algorithm. This technology uses spherical projection of panoramic images. It effectively solves the coordinate transformation between the panoramic imaging plane and the spherical surface; and, in this technology, the coordinate system of each camera in the panoramic camera system is unified into one coordinate system, which effectively solves the problems caused by the movement of each camera in the panoramic camera system. Variations are different and cannot accurately locate the problem of overall motion.
Description
technical field [0001] The invention relates to a panoramic electronic image stabilization method based on spherical projection, is aimed at the electronic image stabilization of a panoramic imaging system, and belongs to the electronic image stabilization field in image processing technology. Background technique [0002] Electronic image stabilization technology is to isolate external disturbances to the imaging system, aiming system, and positioning system. The basic idea is that the movement offset of the camera carrier can be obtained through various mechanical, optical or electronic processing methods, so that this part of the movement offset can be removed before the imaging output, so that it can display a stable video on the monitor. sequence, improving the quality of the acquired image information. [0003] Due to the special structure of the panoramic imaging system, many panoramic imaging systems are not composed of a single camera. The present invention takes ...
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IPC IPC(8): H04N5/21G06T7/80
Inventor 方明徐晶付飞蚺司书哲田野邵桢
Owner CHANGCHUN UNIV OF SCI & TECH