The geometry of two uncalibrated views obtained with a parabolic catadioptric device is the subject of this paper. We introduce the notion of circle space, a natural representation of line images, and the set of incidence preserving transformations on this circle space which happens to equal the Lorentz group. In this space, there is a bilinear constraint on transformed image coordinates in two...

We describe the geometrical properties of solid's shadows projected onto a flat plane by point-light sources. Even though the shape and position of each element are arbitrary and unknown, we indicate that there exists a certain constraint between three shadows on the plane; i.e., three cross points determined by pairs of tangential lines must sit on a straight line. This property is considered ...

I. ABSTRACT A novel visual servoing method is presented. The algorithm works for both apparent contours and point features and does not require any information about the internal camera parameters. The proposed visual servoing is based on the epipolar geometry and exploits the autoepipolar property, a special configuration for the epipoles which occurs when the desired and current views undergo...

We present an approach to detecting and describing compositions of buildings with flat or complex rooftops by using multiple, overlapping images of the scene. First, 3-D features are generated by using multiple images, and rooftop hypotheses are generated by neighborhood searches on those features. For robust generation of 3-D features, we present a probabilistic approach to address the epipola...

This paper describes a method, which removes specularities from image sequences taken by a video camera in uniform straightly-line motion. Specular components, especially strong highlights, raise some problems in object recognition. Based on spatio-temporal image analysis, we are able to detect specular components and reconstruct original texture on the body as diffuse components. Analyzing the...

Man-made environments contain many weakly textured surfaces which are typically poorly modeled in sparse point reconstructions. Most notable, wiry structures such as fences, scaffolds, or power pylons are not contained at all. This paper presents a novel approach for generating line-based 3D models from image sequences. Initially, camera positions are obtained using conventional Structurefrom-M...

Retrieve the structure of model and the motion of camera is a classical and hot topic in computer vision and photogrammetry. A lot of automatic or semiautomatic techniques have been developed to optimize the retrieving processing from accuracy, stability and reality perspectives. These techniques are variant from data source, feature selection for matching, feature clustering and 3D model repre...

The present paper is an extension of a previous work presented in (Soheilian et al., 2006a) in which an automatic algorithm of zebracrossing reconstruction from stereo-pairs of a mobile mapping system was proposed. The method has been adapted to reconstruct different types of rectangular roadmarks. The algorithm can be summarized in three main points. First of all a 3D edge point reconstruction...

A new multiple images matching theory model is proposed in this paper to generate DSM from aerial three line array digital images. Through this model, multiple images (more than 2) can be matched simultaneously and the epipolar line constraint can be used indirectly. Theoretically, the occlusion and multiple solution problems, which are unavoidable in traditionally image matching process, can b...