Image alignment is one of the most widely used techniques in computer vision. Applications range from optical flow and tracking to layered motion, mosaic-ing, and face coding. Of particular concern in many applications is the efficiency of the algorithm. This concern has led to the development of several efficient algorithms such as the Hager-Belhumeur algorithm and the inverse compositional al...

In this study, a novel automatic nano-alignment system using machine vision coupled with a piezoelectric motor for motion control was developed. The analytical algorithm of this visionaided auto-alignment design makes use of inputs of real-time movement captured by CCD to obtain the corresponding output feedback. Through matrix transformation, the algorithm establishes the characteristic matrix...

Multiview analysis of scenes includes the study of sceneindependent constraints satisfied by a configuration of cameras for all types of scenes as well as the study of viewindependent constraints satisfied by any camera on a configuration of points. In this paper, we derive new constraints involving configurations of points that move with constant velocity, with constant acceleration, and for u...

A complete system for old picture restoration is described: in particular, a frame alignment method, a simple deblotching algorithm and a nonlinear approach for contrast enhancement are proposed. The frame alignment uses a global motion compensation, with a logarithmic search for the correction vector. The blotch removal step consists of two stages. Blotches are rst detected using two suitable ...

We study the problem of flocking and velocity alignment in a group of kinematic nonholonomic agents in 2 and 3 dimensions. By analyzing the velocity vectors of agents on a circle (for planar motion) or sphere (for 3D motion), we develop a geodesic control law that minimizes a misalignment potential and results in velocity alignment and flocking. The proposed control laws are distributed and wil...

This study investigates jaw-finger coordination in a task consisting in pointing to a target while naming it with a /pata/ or a /tapa/ utterance stressed either on the first ('CVCV) or on the second (CV'CV) syllable. Optotrack measurements of jaw and finger displacements show that for 'CVCV names, the moment at with the finger reaches the target alignment is synchronized with the maximum of the...

In this paper, we propose a novel geometric method for the alignment of two overlapping range images. The method first employs the traditional ICP criterion to establish a set of possible correspondences and then refine these correspondences using geometric constraints derived from properties of reflected correspondence vectors. In this way, the method overcomes a major limitation of the tradit...

We apply the method of the Smaller Alignment Index (SALI) for determining the ordered or chaotic nature of orbits, on some examples of Hamiltonian systems and symplectic maps. Finding the SALI for a sample of initial conditions allows us to distinguish clearly between regions of phase space where ordered or chaotic motion occurs. The computation of SALI is performed rather easily: For a given o...