To enable high-level semantic indexing of video, we tackle the problem of automatically structuring motion pictures into meaningful story units, namely scenes. In our recent work, drawing guidance from Film Grammar, we proposed an algorithmic solution for extracting scenes in motion pictures based on a shot neighborhood color coherence measure. In this paper, we extend our work by presenting va...

IRON is a low level operator dedicated to the estimation of single and multiple local orientations in images. Previous works have shown that IRON is more accurate and more selective than Gabor and Steerable filters, for textures corrupted with Gaussian noise. In this paper, we propose two new features. The first one is dedicated to the estimation of orientation in images damaged by impulsive no...

Real-world scenes contain low-level visual features (e.g., edges, colors) and high-level semantic features (e.g., objects and places). Traditional visual perception models assume that integration of low-level visual features and segmentation of the scene must occur before high-level semantics are perceived. This view implies that low-level visual features of a scene alone do not carry semantic ...

Sketching provides a natural and compact means for a user to outline a plan for a high-level objective. Previous work on plan sketching required that sketches be valid, meaning that there be at least one legal completion of the sketch relative to predefined planning knowledge. This paper addresses the problem of plan sketch interpretation when the validity assumption does not hold. We present a...

Motion is the most informative cue for human action recognition. Regions with high motion saliency indicate where actions occur and contain visual information that is most relevant to actions. In this paper, we propose a novel approach for human action recognition based on oriented motion salient regions (OMSRs). Firstly, we apply a bank of 3D Gabor filters and an opponent inhibition operator t...

Though accessible gaming is a well-established phenomenon, few mainstream applications of it exist. We present some of the work of the AGRIP project – an effort to develop techniques to render modern first-person shooter games accessible to the blind and vision-impaired. We discuss some of the low-level accessibility infrastructure employed in the game AudioQuake and compare it to other contemp...

Taxation has been neglected in development discussions, allowing mistakes such as the failure to ensure revenue stability during trade liberalisation. Countries exhibit different priorities among revenue creation, redistribution and representation, seriously undermining the value of the limited consensus view. ABOUT THE AUTHOR Alex Cobham is the Director of the OCGG Economy Section and a Supern...

In this work we propose a mechanism which looks at processing the low-level visual information present in video frames and prepares mid-level tracking trajectories of objects of interest within the video. The main component of the proposed framework takes detected objects as inputs and generates their appearance models, maintains them and tracks these individuals within the video. The proposed ...

Isar offers a high-level proof (and theory) language for Isabelle. We give various examples of Isabelle/Isar proof developments, ranging from simple demonstrations of certain language features to a bit more advanced applications. The “real” applications of Isabelle/Isar are found elsewhere.