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首页> 外文期刊>Electronic Letters on Computer Vision and Image Analysis: ELCVIA >Correction for Camera Roll in a Perspectively Distorted Image: Cases for 2 and 3 point perspectives
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Correction for Camera Roll in a Perspectively Distorted Image: Cases for 2 and 3 point perspectives

机译：校正透视失真图像中的相机胶卷：2点和3点透视的情况

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Normal 0 false false false EN-IN X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} We propose a method for correction of camera roll in a perspectively distorted image. Here we employ the rectification of the horizon line formed from the vanishing points in order to bring back the image rotation caused from the camera roll. In teleconference systems, surveillance system, aerial images of buildings, mobile robots visual system etc., the range of camera’s view spreads with pan, tilt and roll. It is intended to take omni-directional images for wide range coverage, but this invariably introduces rotation in many images due to the roll of the camera. This paper presents the method for camera roll correction by using the perspective distortion in images captured from a pan/tilt/roll camera control system. The proposed method works on two cases, viz. Calibrated and uncalibrated cameras. Calibrated camera with intrinsic calibration of the camera such as optical center and the focal length of the camera in cases of two point perspectives is considered and in case of three point perspective uncalibrated camera is considered and the camera is partially calibrated for the camera principal point and the roll is performed subsequently. The result comparison made reveals more about the usability of the algorithm in case of calibrated and uncalibrated cases of the camera used.
机译：正常0否否否EN-IN X-NONE X-NONE / *样式定义* / table.MsoNormalTable {mso-style-name：“ Table Normal”; mso-tstyle-rowband-size：0; mso-tstyle-colband-size：0; mso-style-noshow：是; mso-style-priority：99; mso-style-qformat：是; mso-style-parent：“”; mso-padding-alt：0cm 5.4pt 0cm 5.4pt; mso-para-margin-top：0cm; mso-para-margin-right：0cm; mso-para-margin-bottom：10.0pt; mso-para-margin-left：0cm;线高：115％; mso分页：寡妇孤儿;字体大小：11.0pt;字体家族：“ Calibri”，“ sans-serif”; mso-ascii-font-family：Calibri; mso-ascii-theme-font：minor-latin; mso-fareast-font-family：“时代新罗马”; mso-fareast-主题字体：minor-fareast; mso-hansi-font-family：Calibri; mso-hansi-theme-font：minor-latin;}我们提出了一种校正透视失真图像中相机胶卷的方法。在这里，我们采用消失点形成的水平线的校正，以恢复由相机胶卷引起的图像旋转。在电话会议系统，监视系统，建筑物的航拍图像，移动机器人视觉系统等中，摄像机视野的范围随着平移，倾斜和滚动而扩展。它旨在拍摄全向图像以实现大范围覆盖，但是由于照相机的转动，这总是会在许多图像中引入旋转。本文提出了一种通过使用从平移/倾斜/滚动摄像机控制系统捕获的图像中的透视失真来校正摄像机滚动的方法。所提出的方法适用于两种情况，即。校准和未校准的摄像机。经过校准的摄像机具有摄像机的内部校准，例如在两点透视的情况下考虑了摄像机的光学中心和焦距，而在三点透视的情况下，则考虑了未校准的摄像机，并且已针对摄像机的主要点和部分校准了摄像机该辊随后进行。进行的结果比较揭示了该算法在所用摄像机的已校准和未校准情况下的可用性。

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