This paper presents an approach to extend objectoriented data models, in which versions of an object are allowed to appear at dtyferent levels of an inheritance hierarchy, in contrast to the known approaches where they are admitted only at one level. This approach allows the design and instantiation of objects to become very natural, starting with the design of an object in a class and refining...

The multiple object tracking (MOT) task has been a useful tool for studying the deployment of limited-capacity visual resources over time. Since it involves sustained attention to multiple objects, this task is a promising model for real-world visual cognition. However, real-world tasks differ in two critical ways from standard laboratory MOT designs. First, in real-world tracking, it is unusua...

Most graphical user interface (GUI) libraries forbid accessing UI elements from threads other than the UI event loop thread. Violating this requirement leads to a program crash or an inconsistent UI. Unfortunately, such errors are all too common in GUI programs. We present a polymorphic type and effect system that prevents non-UI threads from accessing UI objects or invoking UI-thread-only meth...

1 Overview We present a new predicative and decidable type system called ML that adds primitive subtyp-ing to the ML type system 17]. Our goal is to devise a type discipline for a strongly typed, higher-order object-oriented language, building on well-understood concepts from type systems for functional languages, rather than on special calculi 1] or resorting to \ad-hoc" polymor-phism 19, 23],...

A new video object segmentation algorithm, which utilizes an extension of recursive shortest spanning tree (RSST) algorithm, is introduced. A 2-D affine motion model is assumed, and correspondingly, for each region, the planar approximation for the given dense motion vector field is computed. Starting from each 2×2 block as a distinct region, the algorithm recursively searches for the best pair...

This paper presents a Poisson multi-Bernoulli mixture (PMBM) conjugate prior for multiple extended object filtering. A Poisson point process is used to describe the existence of yet undetected targets, while a multi-Bernoulli mixture describes the distribution of the targets that have been detected. The prediction and update equations are presented for the standard transition density and measur...

In this paper we present a snake model dedicated to real-time multiple object tracking. This model is able to track moving non-rigid objects in video sequences obtained from moving camera. Contrary to other approaches, here the snake deformation is performed without any preprocessing and the tracking method does not rely on any motion estimation step. The tracking method is based on two simple ...

In this paper we extend the objecf-oriented dalabase model via the concept of object inheritance. We then define a closed and safe object-oriented query algebra. Our algebra is different from any other object-oriented query algebra found in the literature due to the extension of the model with object inheritance. The algebra defined deals with homogeneous sets of objects, and provides the model...