Binocular stereo vision based illuminance measurement used for intelligent lighting with LED

Li, Lianghui; Wang, Jiachen; Yang, Shengli; Gong, Hao

doi:10.1016/j.ijleo.2021.166651

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…Conventional measurement methods were used for the measurement of luminotechnical parameters, using different portable meters, or modern technologies [34]. The measurement of the illumination values was performed using the digital luxmeter shown in Figure 1, the technical parameters of which are presented in Table 1 [35].…”

Section: The Methodology Used To Establish the Quality Luminotechnica...mentioning

confidence: 99%

Technical–Economic Analysis of the Solutions for the Modernization of Lighting Systems

et al. 2022

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In the context of the electricity crisis, measures are needed to reduce energy consumption. The case study was conducted on the lighting system at a university sports hall. To determine the efficiency and quality, the lighting systems and technical characteristics of the sources used were identified, lighting level measurements were made, the luminotechnical coefficients and the power of the whole lighting system were calculated and the results were compared to the values set out in the standards. Following analysis, the lighting system was found not to meet the quality requirements and was energy inefficient. For financial efficiency, only the replacement of lighting was sought, keeping the same equipment and granting the same facilities to the building users. Some lighting source options were analyzed and the option to have the highest luminous efficacy and the highest energy class was chosen. The analysis shows that the investment is amortized within a maximum of 17 months. The innovative aspect is based on linking the measurements with the determination of power and the proposal of modernization solutions, which shows the need for investments to ensure the quality of the system and the increase in energy efficiency.

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Section: The Methodology Used To Establish the Quality Luminotechnica...mentioning

confidence: 99%

Technical–Economic Analysis of the Solutions for the Modernization of Lighting Systems

et al. 2022

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“…The monocular stereoscopic endoscope mainly consists of an endoscope, a light source, a light source bracket and a computer [8]. 8 LEDs are placed around the endoscope, fixed by the light source bracket, and the 8 LEDs illuminate the object in turn, so that the object can be illuminated from different angles, so as to obtain different shadow images of the object; The image information is transmitted to the endoscope detector chip [9], and sent to the computer to provide data for subsequent processing; the computer processes the obtained image, and obtains the surface concave and convex information of the object according to the shadow image of different angles, so as to perform stereoscopic imaging such as Figure 5. Through lens design, a principle prototype platform is built, and LED lighting is used to illuminate the target object at different angles in sequence.…”

Section: Monocular Stereoscopic Visionmentioning

confidence: 99%

Research on small optical system for monocular stereoscopic stray light elimination based on photometric stereovision algorithm

xue,

wang,

cao

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Imaging Detection and Target Recognition

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At present, the two-dimensional images obtained by existing small lenses cannot effectively reflect the three-dimensional structure, and many surface defects in4 industry have obvious three-dimensional morphological changes[1]. Therefore, three-dimensional small optical systems are the development direction of industrial optical technology[2]. In view of the characteristics of small lens, small aperture, and single imaging channel, this paper uses a monocular stereoscopic vision method to iteratively reconstruct depth information, and designs a stray light elimination optical system that can obtain both traditional images and three-dimensional stereoscopic images. , improved the photometric stereo vision algorithm used in traditional telecentric systems, developed close-range 3D imaging suitable for small lens systems and improved the accuracy of 3D imaging.

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“…where F ij (q) denotes the mutual potential energy of atoms i, j after the q-th iteration, β is the depth weighting factor, Q represents the total number of iterations, and h ij (q) denotes the nature of the force that varies with the distance of the atoms. The expressions are shown in Equation ( 23): (23) where h max and h min denote its lower and upper bounds, respectively; and ε is a shift factor that makes the atoms move better when the number of iterations increases to search the global and exploit unknown regions. r ij denotes the Euclidean distance between atoms i and j, and σ(q) denotes the collision diameter between atoms.…”

Section: Aso Algorithmmentioning

confidence: 99%

“…Light intensity refers to the visible-light irradiation on the receiving equipment, measured in lux, which represents the intensity of ambient light around the receiving device. Many buildings today are equipped with fixed indoor lighting equipment, and research indicates that the light intensity received is stronger when closer to the light source in the room, showing a proportional relationship [ 23 ]. However, light intensity shows an irregular distribution due to factors like walls, glass reflections, and the characteristics of the collection equipment.…”

Section: Introductionmentioning

confidence: 99%

A Fusion Positioning Method for Indoor Geomagnetic/Light Intensity/Pedestrian Dead Reckoning Based on Dual-Layer Tent–Atom Search Optimization–Back Propagation

Han,

Yu,

Zhu

et al. 2023

Sensors

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Indoor positioning using smartphones has garnered significant research attention. Geomagnetic and sensor data offer convenient methods for achieving this goal. However, conventional geomagnetic indoor positioning encounters several limitations, including low spatial resolution, poor accuracy, and stability issues. To address these challenges, we propose a fusion positioning approach. This approach integrates geomagnetic data, light intensity measurements, and inertial navigation data, utilizing a hierarchical optimization strategy. We employ a Tent-ASO-BP model that enhances the traditional Back Propagation (BP) algorithm through the integration of chaos mapping and Atom Search Optimization (ASO). In the offline phase, we construct a dual-resolution fingerprint database using Radial Basis Function (RBF) interpolation. This database amalgamates geomagnetic and light intensity data. The fused positioning results are obtained via the first layer of the Tent-ASO-BP model. We add a second Tent-ASO-BP layer and use an improved Pedestrian Dead Reckoning (PDR) method to derive the walking trajectory from smartphone sensors. In PDR, we apply the Biased Kalman Filter–Wavelet Transform (BKF-WT) for optimal heading estimation and set a time threshold to mitigate the effects of false peaks and valleys. The second-layer model combines geomagnetic and light intensity fusion coordinates with PDR coordinates. The experimental results demonstrate that our proposed positioning method not only effectively reduces positioning errors but also improves robustness across different application scenarios.

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Binocular stereo vision based illuminance measurement used for intelligent lighting with LED

Cited by 13 publications

References 17 publications

Technical–Economic Analysis of the Solutions for the Modernization of Lighting Systems

Technical–Economic Analysis of the Solutions for the Modernization of Lighting Systems

Research on small optical system for monocular stereoscopic stray light elimination based on photometric stereovision algorithm

A Fusion Positioning Method for Indoor Geomagnetic/Light Intensity/Pedestrian Dead Reckoning Based on Dual-Layer Tent–Atom Search Optimization–Back Propagation

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