Digitally unwrapping paper sheets is a crucial step for document scanning and accurate text recognition. This paper presents a method for automatically rectifying curved or folded paper sheets from a small number of images captured from different viewpoints. Unlike previous techniques that require either an expensive 3D scanner or over-simplified parametric representation of the deformations, o...

Most outdoor visual surveillance scenes involve objects moving on a ground plane. We present a new, fully automated technique for both affine and metric rectification of this ground plane (up to a scale factor) by simply tracking moving objects. In particular, we derive the necessary constraints on the image plane to ground plane projective transformation by observing objects which move at cons...

A very important property of the usual pinhole model for camera projection is that 3D lines in the scene are projected to 2D lines. Unfortunately, wide-angle lenses (specially low-cost lenses) may introduce a strong barrel distortion, which makes the usual pinhole model fail. Lens distortion models try to correct such distortion. In reference 1., we propose an algebraic approach to the estimati...

structures by incoherent thermal excitation A. Anadón, 2, a) R. Ramos, 4 I. Lucas, 2 P.A. Algarabel, 5 L. Morellón, 2 M.R. Ibarra, 2, 6 and M.H. Aguirre 2, 6 Instituto de Nanociencia de Aragón, Universidad de Zaragoza, E-50018 Zaragoza, Spain Departamento de F́ısica de la Materia Condensada, Universidad de Zaragoza, E-50009 Zaragoza, Spain WPI Advanced Institute for Materials Research, Tohoku Un...

This paper describes a method that allows the composition of an overhead view mosaic of a worksite from the views available. This global view of the site will help a teleoperator to adequately specify the actions to be performed in the realization of a given task. The idea proposed here is to obtain the overhead view by combining two known techniques, namely mosaicing and image rectification.

We present a systematic study to highlight some of the fundamental physics that governs metamaterial based electromagnetic thermal rectifiers. In such thermal rectifiers, the rectification arises from the alignment or misalignment of surface resonances in the forward or reverse scenarios, whereas the bulk states of metamaterials do not contribute to rectification. Therefore, we show that one ca...

In this paper, we present a hybrid approach to motion data manipulation. Motion signal is decomposed into multi-resolution levels with wavelet analysis. The coarse level represents the globe pattern of a motion signal while the fine levels describe the individual styles. Special motion style can be highlighted through enhancing the corresponding level content and can be fused into other motions...

For geostationary meteorological satellite (GSMS) remote sensing image registration, high computational cost and matching error are the two main challenging problems. To address these issues, this paper proposes a novel algorithm named slope-restricted multi-scale feature matching. In multi-scale feature matching, images are subsampled to different scales. From a small scale to a large scale, t...