Line extraction in uncalibrated central images with revolution symmetry
نویسندگان
چکیده
In omnidirectional cameras, straight lines are projected onto curves called line-images. The shape of these curves is strongly dependent of the particular camera configuration. The great diversity of omnidirectional camera systems makes harder the line-image extraction in a general way. Therefore, it is difficult to design uncalibrated general approaches, and existing methods to extract lines in omnidirectional images require the camera calibration. In this paper, we present a novel method to extract line-images in uncalibrated images which is valid for radially symmetric central systems. In central systems the projection surface of a 3D line is a plane which has two degrees of freedom (DOF). That means we only can recover two of the four degrees of freedom of the line from a single projection. If a line-image is a curve which has more than two degrees of freedom, the
منابع مشابه
Reconstruction of Surfaces of Revolution from Single Uncalibrated Views
This paper addresses the problem of recovering the 3D shape of a surface of revolution from a single uncalibrated perspective view. The algorithm introduced here makes use of the invariant properties of a surface of revolution and its silhouette to locate the image of the revolution axis, and to calibrate the focal length of the camera. The image is then normalized and rectified such that the r...
متن کاملReconstruction of Surface of Revolution from Multiple Uncalibrated Views: a Bundle-adjustment Approach
This paper addresses the problem of recovering the 3D shape of a surface of revolution from multiple uncalibrated perspective views. In previous work, we have exploited the invariant properties of the surface of revolution and its silhouette to recover the contour generator and hence the meridian of the surface of revolution from a single uncalibrated view. However, there exists one degree of f...
متن کاملA Unified Framework for Line Extraction in Dioptric and Catadioptric Cameras
Many of the omnidirectional visual systems have revolution symmetry and, consequently, they can be described by the radially symmetric distortion model. Following this projection model, straight lines are projected on curves called line-images. In this paper we present a novel unified framework to deal with these line-images directly on the image which is valid for any central system. In order ...
متن کاملImage Mosaicing from Uncalibrated Views of a Surface of Revolution
We present a novel approach to obtain a mosaic image for the surface texture content of a surface of revolution (SOR) from a collection of uncalibrated views. The SOR scene constraint is used to calibrate each view and align the corresponding pictorial content into a global representation. Metric surface properties are extracted from each view by exploiting special properties of the imaged SOR ...
متن کاملUncalibrated 3 metric reconstruction and flattened texture acquisition from a single view of a surface of revolution
We describe a geometric approach for reconstructing 3D textured graphical models of surface of revolution (SOR) objects from a single uncalibrated view. Our approach is based on the fact that, for the object class of interest, the structure of the scene provides enough constraints for camera calibration even from a single view. Reconstruction (up to a scaling factor) of 3D shape is complemented...
متن کامل