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Phase measuring profilometry is an important measurement method of the optical 3D measurement system, in which the projector is used in the grating fringe projection. Then there are some shortcomings to the projector used in the projection process. In this paper, the physical grating equipment based on the design of a projection is designed and structural parameter to filming machine is optimized...
This paper presents a novel digital video stabilization approach that provides both efficiency and robustness. In this approach, features of each frame are first detected by the oriented features from accelerated segment test (FAST) method, and then the corresponding features between consecutive frames are matched by a very fast binary descriptor which is based on the rotated binary robust independent...
This article researches the applications of tree growth status tracking based on binocular vision. We conducted experiments using dual-camera of parallel optical axis to capture images, by the way of looking feature points calibrated in the tree's image to match the two images of trees. We calculated the spatial information change of the trees marked point within a certain time interval changes, and...
In this paper, we address the problem of vehicle detection and tracking with low-angle cameras by combining windshield detection and feature points clustering, effectively fusing several primitive image features such as color, edge and interest point. By exploring various heterogenous features and multiple vehicle models, we achieve at least two improvements over the existing methods: higher detection...
In order to provide contextual cues for the visually impaired to navigate safely in outdoor dynamic situations, an outdoor navigation aid system, AudioGuide, is developed based on a PDA in this paper. It leverages technological advances in computer vision, global positioning system (GPS), geographic information system (GIS), and auditory displays. The camera embedded in the PDA captures dynamic environmental...
Optical flow in Driver Assistance Systems (DAS) must be robust to variations in illumination and handle large disparities in real time. Although a pyramidal variation of Total Variation Regularized L1 (TV-L1) optical flow can handle large disparities, TV-L1 is not adequate for real world DAS since the ambient light changes dynamically in typically encountered scenes. We present a novel improved TV-L...
In this paper, we investigate the applicability of the newly proposed data clustering method, affinity propagation, in feature points clustering and the task of vehicle detection and tracking in road traffic surveillance. We propose a model-based temporal association scheme and novel preprocessing and postprocessing operations which together with affinity propagation make a quite successful method...
Smart camera system design and implementation is a challenging task due to the constant need to perform computationally demanding image processing tasks with the limited resource constraints of embedded systems. This paper presents the hardware and software co-design and implementation of the first stage of TraffiCam, an FPGA based smart camera prototype for traffic surveillance at intersections,...
The MPEG-4 video coding standard introduces a novel concept of sprite or mosaic that is a large image composed of pixels belonging to a video object visible throughout a video segment. The sprite captures spatio-temporal information in a very compact way and makes it possible for efficient object-based video compression. In this paper, we propose a practical approach to generating multiple super-resolution...
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