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14995 Publications
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  • Generalized Vision-Based Detection, Identification and Pose Estimation of Lamps for BIM Integration

    Troncoso-Pastoriza, Francisco; López-Gómez, Javier; Febrero-Garrido, Lara (2018)
    This paper introduces a comprehensive approach based on computer vision for the automatic detection, identification and pose estimation of lamps in a building using the image and location data from low-cost sensors, allowing the incorporation into the building information modelling (BIM). The procedure is based on our previous work, but the algorithms are substantially improved by generalizing the detection to any light surface type, including polygonal and circular shapes, and refining the B...

    Integration of Low-Cost GNSS and Monocular Cameras for Simultaneous Localization and Mapping

    Chen, Xiao; Hu, Weidong; Zhang, Lefeng; Shi, Zhiguang; Li, Maisi (2018)
    Low-cost Global Navigation Satellite System (GNSS) receivers and monocular cameras are widely used in daily activities. The complementary nature of these two devices is ideal for outdoor navigation. In this paper, we investigate the integration of GNSS and monocular camera measurements in a simultaneous localization and mapping system. The proposed system first aligns the coordinates between two sensors. Subsequently, the measurements are fused by an optimization-based scheme. Our system can ...

    A Sensor Image Dehazing Algorithm Based on Feature Learning

    Liu, Kun; He, Linyuan; Ma, Shiping; Gao, Shan; Bi, Duyan (2018)
    To solve the problems of color distortion and structure blurring in images acquired by sensors during bad weather, an image dehazing algorithm based on feature learning is put forward to improve the quality of sensor images. First, we extracted the multiscale structure features of the haze images by sparse coding and the various haze-related color features simultaneously. Then, the generative adversarial network (GAN) was used for sample training to explore the mapping relationship between di...

    Ambient Refractive-Index Measurement with Simultaneous Temperature Monitoring Based on a Dual-Resonance Long-Period Grating Inside a Fiber Loop Mirror Structure

    Zawisza, Renata; Eftimov, Tinko; Mikulic, Predrag; Bock, Wojtek J.; Jaroszewicz, Leszek R. (2018)
    In this work, we report the experimental results on optimizing the optical structure for ambient refractive index measuring with temperature changes monitoring. The presented optical structure is based on a dual-resonance long-period grating embedded inside a fiber loop mirror, where the long-period grating acts as the head of the refractive-index sensor, whereas the section of polarization maintaining fiber in the loop mirror ensures suitable temperature sensing. The optimization process was...

    Remote Cell Growth Sensing Using Self-Sustained Bio-Oscillations

    Pablo Pérez; Gloria Huertas; Alberto Olmo; Andrés Maldonado-Jacobi; Juan A. Serrano; María E. Martín; Paula Daza; Alberto Yúfera (2018)
    A smart sensor system for cell culture real-time supervision is proposed, allowing for a significant reduction in human effort applied to this type of assay. The approach converts the cell culture under test into a suitable “biological” oscillator. The system enables the remote acquisition and management of the “biological” oscillation signals through a secure web interface. The indirectly observed biological properties are cell growth and cell number, which are straig...
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