We present an original approach for non parametric motion analysis in image sequences. It relies on the statistical modeling of distributions of local motion-related measurements computed over image sequences. Contrary to previously proposed methods, the use of temporal multiscale Gibbs models allows us to handle in a unified statistical framework both spatial and temporal aspects of motion con...

objectives: the gals (gait, arms, legs and spine) examination is a compact version of standard procedures used by rheumatologists to determine musculoskeletal disorders in patients. computerization of such a clinical procedure is necessary to ensure an objective evaluation. this article presents the first steps in such an approach by outlining a procedure to use motion analysis techniques as a ...

Estimation of motion has many applications in fluid analysis. Lots of work has been carried out using Particle Image Velocimetry to design experiments which capture and measure the flow motion using 2D images. Recent technological advances allow capturing 3D PIV image sequences of moving particles. In this context, we propose a 3D motion estimation technique based on the combination of an itera...

W e address the problem of qualitative shape recovery f rom moving surfaces. Our analysis is unique an that we consider specular interreflections and explore the effects of both motion parallax and changes an shading. To study this si tuation we define an image flow field called the reflection flow field, which describes the motion of reflection points and the mot ion of the surface. From a kin...

With the arrival of increasingly higher resolution PET systems, small amounts of motion can cause significant blurring in the images, compared to the intrinsic resolutions of the scanners. In this work, we have reviewed advanced correction methods for the three cases of (i) unwanted patient motion, as well as motions due to (ii) cardiac and (iii) respiratory cycles. For the first type of ...

This article describes the development of a platform designed to visualize the 3D motion of the tongue using ultrasound image sequences. An overview of the system design is given and promising results are presented. Compared to the analysis of motion in 2D image sequences, such a system can provide additional visual information and a quantitative description of the tongue’s 3D motion. The platf...

An approach for learning and estimating temporal-ow models from image sequences is proposed. The temporal-ow models are represented as a set of orthogonal temporal-ow bases that are learned using principal component analysis of instantaneous ow measurements. Spatial constraints on the temporal-ow are also developed for modeling the motion of regions in rigid and coordinated motion. The performa...

Intraoperative optical imaging of exposed organs in visible, nearinfrared, and infrared (IR) wavelengths in the body has the potential to be useful for real-time assessment of organ viability and image guidance during surgical intervention. However, the motion of the internal organs presents significant challenges for fast analysis of recorded 2D video sequences. The movement observed during su...