Reconstruction of cumulative daylight illumination fields from high dynamic range imaging: Theory, deployment and <i>in-situ</i> validation

Mardaljevic, John; Cannon-Brookes, Stephen; Blades, Nigel; Lithgow, Katy

doi:10.1177/1477153520945755

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Combined with the above settings, we can calculate the current focal length of the farthest recognition point [10]. As shown in the following formula 1: [11]. Combined with the current test, the focal length of the farthest recognition point is calculated, and as a specific recognition standard, the farthest edge recognition point is set, the specific coverage position of the farthest recognition point is defined, the width and height directions are 12.05m and 16.54m, and the imaging width is set [12].…”

Section: Set the Farthest Identification Point Of The Cameramentioning

confidence: 99%

Research on layout method of monitoring camera in non-direct-view area of substation

Li,

Zhang,

Chen

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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At present, the layout model of monitoring cameras in non-direct-view areas is generally target-oriented, and the coverage of monitoring cameras is limited, which leads to the reduction of the recognition extension ratio of the sensing range of monitoring cameras. Therefore, the design and research on the layout method of monitoring cameras in non-direct-view areas of substations are proposed. According to the current test requirements, the farthest identification point of the camera is set first, and the effective sensing area of the non-direct-view area is calculated. Based on this, the limitation of the surveillance camera coverage is broken by adopting a multi-target method, and an adaptive multi-target surveillance camera layout model is designed, and the camera layout is realized by adopting a "flat package vertical" correction processing method. The final test results show that: after three stages of auxiliary testing, the extension ratio of the detection range of the monitoring camera can reach above 6, which shows that the monitoring camera layout method in the nondirect-view area of the substation is more efficient, specific, targeted and has practical application value with the help of intelligent technology, predictive auxiliary structure and virtual interference processing technology.

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Section: Set the Farthest Identification Point Of The Cameramentioning

confidence: 99%

Research on layout method of monitoring camera in non-direct-view area of substation

Li,

Zhang,

Chen

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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“…The technique was validated under both controlled and in-situ conditions over periods of several months and shown to have comparable accuracy to the illuminance logging devices commonly used in historic/conservation settings. It is fully described in Mardaljevic et al (2021).…”

Section: Radiance Simulation (~1992)mentioning

confidence: 99%

A hybrid measurement-simulation approach to determine the reflectance map of a historic tapestry

Mardaljevic¹,

Brembilla²,

Cannon-Brookes³

et al. 2021

Building Simulation Conference Proceedings

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Illumination levels in historic buildings need to be monitored for conservation purposes, especially in daylit spaces which are invariably subject to large spatio-temporal variations in light levels. However, light meters record only at a single point, and numbers are limited. A recently demonstrated imagebased technique using digital cameras to measure indirectly the prevailing daylight illumination in spaces is extended. As a prerequisite, the technique requires a reflection map of the 'target' -here, a historic tapestry. Acquiring this without disturbance to the scene required a novel combination of in-situ measurement and lighting simulation. How this was achieved is described in the paper. Key Innovations• Hybrid lighting measurement and simulation approach to assess luminous environment in historic buildings. • Method to derive reflectance of complex patterned surfaces. • Characterisation of the albedo map of a historic tapestry. • Derivation of long-term illumination (i.e. light dose) from autonomous HDR capture. Practical ImplicationsQuantifying the amount of light exposure on artwork and fabrics in historic properties is essential for their conservation. The method presented here combines simulation and measurement, as well as laboratory and field work, to reduce errors and derive accurate albedo maps of complex patterned surfaces. Historic spaces that are open to public and that showcase fixed, light-sensitive features will benefit from the non-intrusive, non-destructive analysis of long-term light exposure, for which the albedo map is a necessary prerequisite.

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Computational modelling and simulation to mitigate the risk of daylight exposure in tropical museum buildings

Mangkuto

Simamora²,

Pratiwi³

et al. 2024

Energy and Built Environment

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Reconstruction of cumulative daylight illumination fields from high dynamic range imaging: Theory, deployment and in-situ validation

Cited by 6 publications

References 16 publications

Research on layout method of monitoring camera in non-direct-view area of substation

Research on layout method of monitoring camera in non-direct-view area of substation

A hybrid measurement-simulation approach to determine the reflectance map of a historic tapestry

Computational modelling and simulation to mitigate the risk of daylight exposure in tropical museum buildings

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