We compared the precision of perceptual localization and manual pointing. A Gaussian blob was presented 6 degrees to the right or left of a central fixation spot on a CRT screen. Above and below the blob, vertical lines were displayed. On each trial, the blob was slightly offset to the right or left with respect to the lines. The subjects had to judge whether the blob appeared to the right or t...

This paper presents a framework to simultaneously segment and track multiple body parts of interacting humans in the presence of mutual occlusion and shadow. The framework uses multiple free-form blobs and a coarse model of the human body. The color image sequence is processed at three levels: pixel level, blob level, and object level. A Gaussian mixture model is used at the pixel level to trai...

The misperceived direction of type-II plaids has posed a problem for the intersection of constraints (IOC) model of two-dimensional motion perception. Alais et al. (1994, Vision Research, 34, 1823-1834) examined the perceived direction of type-II plaids and concluded that in addition to the direction signalled by the IOC process, a monocular mechanism signalling the motion of plaid features (bl...

Software engineers often need to identify in their systems “poor” design choices—design defects—that hinder the development and maintenance, as opportunities of improvements and as a measure of the quality of their systems. However, the detection of design defects is difficult because of the lack of specifications and tools. We propose DECOR, a method to specify design defects systematically an...

Measurement of blob-like structure in the boundary region of ECRH plasmas in a simple magnetic configuration in QUEST (major radius, R = 0.68 m, minor radius, a = 0.40 m and toridal magnetic field, Bt = 0.25 T at R = 0.64 m) using combination of a fast imaging camera with a movable and rotatable Langmuir probe system was presented. The blob-like structures, which had an elongated structure alon...

One problem of individual tree detection on aerial images or on raster canopy height models is handling of tree crowns of different sizes. On laser scanner data one size attribute, height, is directly available. This gives possibilities to develop processing methods that adapt to the object size. In this study, three adaptive methods were developed and tested for individual tree detection on ca...

Context. User Interfaces (UIs) intensively rely on event-driven programming: widgets send UI events, which capture users’ interactions, to dedicated objects called controllers. Controllers use several UI listeners that handle these events to produce UI commands. Objective. The first objective of this work is to show empirical evidences that the code that describes and controls UIs can be affect...

We report on the discovery of a z = 3.16 Lyman-α emitting blob in the GOODS South field. The blob has a total Lyα luminosity of ∼ 10 43 erg s −1 and a diameter larger than 60 kpc. The available multi-wavelength data in the GOODS field consists of 13 bands from X-rays (Chandra) to infrared (Spitzer). Unlike other discovered Lyα blobs, this blob shows no obvious continuum counterpart in any of th...

We summarize our axioms for higher categories, and describe the "blob complex." Fixing an n-category , the blob complex associates a chain complex B(*)(W;C) to any n-manifold W. The zeroth homology of this chain complex recovers the usual topological quantum field theory invariants of W. The higher homology groups should be viewed as generalizations of Hochschild homology (indeed, when W = S(1)...