A scale and orientation adaptive mean shift tracking (SOAMST) algorithm is proposed in this paper to address the problem of how to estimate the scale and orientation changes of the target under the mean shift tracking framework. In the original mean shift tracking algorithm, the position of the target can be well estimated, while the scale and orientation changes can not be adaptively estimated...

In this paper, a Scale-orientation histogram is de.ned for analyzing the “directionality” and “periodicity”, which are two of the most important deterministic dimensions in human texture perception. This histogram is applied to texture retrieval in a case study, and the experimental results illustrate its e4ectiveness. ? 2002 Pattern Recognition Society. Published by Elsevier Science Ltd. All r...

The multi–scale Frangi vesselness filter is an established tool in (retinal) vascular imaging. However, it cannot properly cope with crossings or bifurcations since it only looks for elongated structures. Therefore, we disentangle crossings/bifurcations via (multiple scale) invertible orientation scores and apply vesselness filters in this domain. This new method via scale–orientation scores pe...

Introduction: In this study, the authors aimed to examine theeffects of cooperative learning methods using Web Quest andteam-based learning on students’ self-direction, self-regulation,and academic achievement.Methods: This is a comparative study of students taking a course inmental health and psychiatric disorders. In two consecutive years,a group of students were trained using the Web Quest a...