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We describe a system for content-based retrieval from large surveillance video archives, using behavior, action and appearance of objects. Objects are detected, tracked, and classified into broad categories. Their behavior and appearance are characterized by action detectors and descriptors, which are indexed in an archive. Queries can be posed as video exemplars, and the results can be refined through...
Despite the availability of various Process Analytical Technologies (PAT) for measuring other particle properties, their inherit limitations for the measurement of crystal shape have been restricted. This has impacted, in turn, on the development and implementation of optimisation, monitoring and control of crystal shape and size distributions within particle formulation and processing systems In...
This paper provides a method to determine the common lightning termination locations over a fixed horizon, using a set of lightning photographs and South African Lightning Detection Network (SALDN) data. A single flash evaluation is provided, which demonstrates the general matching method. Thereafter, the method used to perform bulk image processing for determining preliminary lightning termination...
Gaze tracking is an important technique for human-computer interaction. A novel gaze tracking method with two lights and one camera is proposed, in which the similarity between spatial triangles is utilised to estimate the point-of-gaze, and a two-stage calibration is used to improve the estimation precision. Experiments show this method has low complexity, and its average gaze estimation error is...
In this paper, we present a system for indoor human localization that does not need 3D reconstruction of features or landmarks. We assume that a video sequence has been acquired and that keyframes have been registered with respect to 2D positions and orientations. In online mode, we use only a handheld monochrome fisheye camera and a synchronized IMU as sensory inputs. The query is not based on a...
In the recent decades much research has been performed in order to allow better control of arc welding processes, but the success has been limited, and the vast majority of the industrial structural welding work is therefore still being made manually. Closed-loop and nearly-closed-loop control of the processes requires the extraction of characteristic parameters of the welding groove close to the...
Among biometric modalities existing nowadays for person identification, iris pattern recognition has reputed as one of the best performance systems. Unfortunately it has the lack of the user-friendliness that can be seen in hand geometry or face systems. To overcome these problems we propose a new kind of camera to capture iris image.
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