A 360-degree Omnidirectional Photometer Using a Ricoh Theta Z1

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dc.contributor.advisorBrown, Michael S.
dc.contributor.authorMacPherson, Ian Michael
dc.date.accessioned2023-12-08T14:24:46Z
dc.date.available2023-12-08T14:24:46Z
dc.date.issued2023-12-08
dc.date.updated2023-12-08T14:24:41Z
dc.degree.disciplineComputer Science
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractSpot photometers measure the luminance emitted or reflected from a small surface area in a physical environment. Because the measurement is limited to a "spot," capturing dense luminance readings for an entire environment is impractical. This thesis demonstrates the potential of using an off-the-shelf commercial camera to operate as a 360-degree luminance meter. The method uses the Ricoh Theta Z1 camera, which provides a full 360-degree omnidirectional field of view and an API to access the camera's minimally processed RAW images. Working from the RAW images, this thesis describes a calibration method to map the RAW images under different exposures and ISO settings to luminance values. By combining the calibrated sensor with multi-exposure high-dynamic-range imaging, a cost-effective mechanism for capturing dense luminance maps of environments is provided. The results show that the Ricoh Theta calibrated as a luminance meter performs well when validated against a significantly more expensive spot photometer.
dc.identifier.urihttps://hdl.handle.net/10315/41614
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectComputer science
dc.subject.keywordsComputational photography
dc.subject.keywordsComputer vision
dc.subject.keywords360-degree luminance measurement
dc.subject.keywordsRicoh Theta Z1
dc.subject.keywordsHigh dynamic range imaging
dc.subject.keywordsHDR
dc.titleA 360-degree Omnidirectional Photometer Using a Ricoh Theta Z1
dc.typeElectronic Thesis or Dissertation

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