Estimation of local orientations in multivariate signals is an important problem in image processing and computer vision. This general problem formulation also covers optical flow estimation, which can be regarded as orientation estimation in space-time-volumes. Modelling a signal using only a single orientation, however, is often too restrictive, since occlusions and transparencies occur frequently, thus necessitating the modelling and analysis of multiple orientations. We, therefore, develop a unifying mathematical model for multiple orientations: Beyond describing an arbitrary number of orientations in scalar- and vector-valued image data such as color image sequences, it allows the unified treatment of additively and occludingly superimposed oriented structures as well as of combinations of these. Based on this model, we describe estimation schemes for an arbitrary number of additively or occludingly superimposed orientations in images. We confirm the performance of our framework on both synthetic and real image data.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/TIP.2009.2019307 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An MRI assessment of mechanisms underlying lesion growth and shrinkage in multiple sclerosis.
Ann Clin Transl Neurol
January 2025
NMR Research Unit, Queen Square Multiple Sclerosis Centre, UCL Queen Square Institute of Neurology, University College London, London, UK.
Objective: To assess the pathological mechanisms contributing to white matter (WM) lesion expansion or contraction and remyelination in multiple sclerosis (MS).
Methods: We assessed 1,613 lesions in 49 people with relapsing-remitting MS in the CCMR-One bexarotene trial (EudraCT 2014-003145-99). We measured lesion orientation relative to WM tracts, surface-in gradients and veins.
Introduction: The mental health of gay and bisexual men (GBM) who use pre-exposure prophylaxis (PrEP) may be negatively impacted by experiences of stigma.
Methods: To assess the relationship between stigma and mental health among GBM who use PrEP in Guatemala, we conducted a survey with 162 PrEP users recruited in a community-based PrEP clinic.
Results: In multiple linear regression analyses, greater internalized (ß=1.
Need-supportive coaching and engagement in Chinese high school football players: a serial mediation model.
Front Psychol
January 2025
Faculty of Sports Science and Coaching, Sultan Idris Education University, Tanjong Malim, Malaysia.
Introduction: This study aimed to investigate the relationship between need-supportive coaching behavior, subjective task value, goal orientation, and engagement among Chinese high school football players and propose four research hypotheses better to understand the determinants and mechanisms of athlete engagement.
Methods: Participants were 385 Chinese high school football players (228 boys; 157 girls; Mage = 16.07 years; SD = 1.
3D printing of biological tooth with multiple ordered hierarchical structures.
Mater Today Bio
February 2025
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, PR China.
Natural teeth fulfill functional demands by their heterogeneity. The composition and hydroxyapatite (HAp) nanostructured orientation of enamel differ from those of dentin. However, mimicking analogous materials still exhibit a significant challenge.
View Article and Find Full Text PDFEconomic Evaluations of Health Service Interventions Targeting Patients with Multimorbidities: A Scoping Literature Review.
Int J Integr Care
January 2025
Center for Research on Health and Social Care Management (CERGAS), SDA Bocconi School of Management, Milan, Italy.
Introduction: Multimorbid patients have been growing, leading to an exponential increase in healthcare costs and patterns of resource utilization. Despite the heightened interest toward integrated care programs as a response to the complex need of multimorbid patients, economic evaluations of these programs remain scarce. This work investigated the economic evaluations of service interventions targeting multimorbid patients, to identify the characteristics of these programs and the methods applied to their evaluation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!