In this paper is presented a novel image processing tool for the extraction of geometric information in otolith images. It relies on the reconstruction of individual otolith shape histories from otolith images. Based on the proposed non-parametric level-set representation of otolith shape history, applications to the extraction of growth axes and ring structures in otolith images are first cons...

An analog VLSI circuit used to model spectral shape analysis in the central auditory system is presented. Like the receptive fields of visual cortical neurons, the spectral response fields (SRFs) of neurons in the mammalian primary auditory cortex (AI) resemble localized sinusoids of various phases (i.e., symmetry) and scale (i.e., spectral bandwidth). We use a single circuit building block to ...

We present in this paper the application of mathematical morphology operators through a transformation of the Cartesian image into another geometric space, i.e. pol-log image. The conversion into polar-logarithmic coordinates as well as the derived cyclic morphology provides satisfying results in image analysis applied to round objects or spheroid-shaped 3D-object models. As an example of appli...

We present an automated veriication technique for veriica-tion of concurrent linked lists with integer variables. We show that using our technique one can automatically verify invariants that relate (unbounded) integer variables and heap variables such as head 6 = null ! numItems > 0. The presented technique extends our previous work on composite symbolic representations with shape analysis. Th...

| Morphological size distributions and densities are frequently used as descriptors of granularity or texture within an image. They have been successfully employed in a number of image processing and analysis tasks, including shape analysis, multiscale shape representation, texture classiication, and noise ltering. In most cases however it is not possible to analytically compute these quantitie...

Statistical shape models have been extensively used in several image analysis problems, providing accurate estimates of object boundaries. However, their performance degrades if the object of interest is surrounded by a cluttered background, and the features extracted from the image contain outliers. Under these assumptions, most deformable models fail since they are attracted towards the outli...

A new method for shape analysis of X-ray images of human hand bones for estimation of bone maturity is proposed. To handle low contrast and non-uniformity of X-ray images, we design stable pre-processings to enhance images. The contour extraction method is based on local force control of a connected contour for deforming so as to fit it to an outline of a piece of bone. As a result with real im...

Shape matrices have been used as a representation of planar shapes like industrial parts or printed characters. In this paper, we investigate the use of shape matrices as a mixed shape factor for off-line signature verification. By mixed shape factor we mean any global shape factor where the position of local measurements are take into account in the definition of a similarity measure between t...

Automatic delineation of the prostate boundary in transrectal ultrasound (TRUS) can play a key role in image-guided prostate intervention. However, it is a very challenging task for several reasons, especially due to the large variation of the prostate shape from the base to the apex. To deal with the problem, a new method for incrementally learning the patient-specific local shape statistics i...

Docking simulates molecular interactions. Protein protein docking, owing to the sizes of molecules, is a very challenging problem. As the number of degrees of freedom in the molecular structure of proteins is huge, docking algorithms consider the molecules as relatively rigid bodies. Shape matching of two protein molecules is computationally difficult because the possibilities of matching the m...