826 resultados para Image and video indexing
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In this paper we present a scalable software architecture for on-line multi-camera video processing, that guarantees a good trade off between computational power, scalability and flexibility. The software system is modular and its main blocks are the Processing Units (PUs), and the Central Unit. The Central Unit works as a supervisor of the running PUs and each PU manages the acquisition phase and the processing phase. Furthermore, an approach to easily parallelize the desired processing application has been presented. In this paper, as case study, we apply the proposed software architecture to a multi-camera system in order to efficiently manage multiple 2D object detection modules in a real-time scenario. System performance has been evaluated under different load conditions such as number of cameras and image sizes. The results show that the software architecture scales well with the number of camera and can easily works with different image formats respecting the real time constraints. Moreover, the parallelization approach can be used in order to speed up the processing tasks with a low level of overhead
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Proceedings of the 12th DOCOMOMO International Conference
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In this paper we propose an innovative approach to tackle the problem of traffic sign detection using a computer vision algorithm and taking into account real-time operation constraints, trying to establish intelligent strategies to simplify as much as possible the algorithm complexity and to speed up the process. Firstly, a set of candidates is generated according to a color segmentation stage, followed by a region analysis strategy, where spatial characteristic of previously detected objects are taken into account. Finally, temporal coherence is introduced by means of a tracking scheme, performed using a Kalman filter for each potential candidate. Taking into consideration time constraints, efficiency is achieved two-fold: on the one side, a multi-resolution strategy is adopted for segmentation, where global operation will be applied only to low-resolution images, increasing the resolution to the maximum only when a potential road sign is being tracked. On the other side, we take advantage of the expected spacing between traffic signs. Namely, the tracking of objects of interest allows to generate inhibition areas, which are those ones where no new traffic signs are expected to appear due to the existence of a TS in the neighborhood. The proposed solution has been tested with real sequences in both urban areas and highways, and proved to achieve higher computational efficiency, especially as a result of the multi-resolution approach.
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Mode of access: Internet.
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Includes bibliography.
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Mode of access: Internet.
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"Submitted to the Illinois General Assembly pursuant to section 21-1101(j) of the Illinois Public Utilities Act."
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Contains references to Lydia Maria Child, p. 97. Sarah M. and Angeline E. Grimke, pp. 98-99.
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Mode of access: Internet.
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Mode of access: Internet.
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Using photographic images from South East Queensland mid-twentieth-century architecture, this essay investigates the translation and regeneration of modern themes into a local idiom that resonates with poetic qualities of pre-existent forms of inhabitation. It contributes to the discussion of the photograph's role in communicating meaning in architecture through its potential to "reveal" the idiomatic.