2020
DOI: 10.1080/17452007.2020.1862041
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Applying photogrammetry to reconstruct 3D luminance point clouds of indoor environments

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Cited by 7 publications
(3 citation statements)
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“…As in Section 2.2.3 , the HDR images were exported as 32-bit EXR files from the TLS measurement data, and the 32-bit EXR files were converted to 16-bit TIF files, applying Python 3.6.9 with libraries OpenEXR (1.3.2) (San Francisco, CA, USA), Numpy (1.16.6) (Cambridge, MA, USA), and OpenCV-Python (4.2.0.32) (Willow Garage, Menlo Park, CA, USA). Relative luminance values were calculated for each pixel in the 16-bit TIF files applying Equation ( 5 ), and the 16-bit relative monochromatic luminance values were coded over the three 8-bit RGB channels of a respective pixel and a new image was saved as an 8-bit TIF [ 25 ]. Hence, the new 8-bit relative luminance TIF image contains a wider dynamic range than a regular 8-bit RGB image, as all three channels carry the relative luminance data.…”
Section: Materials and Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…As in Section 2.2.3 , the HDR images were exported as 32-bit EXR files from the TLS measurement data, and the 32-bit EXR files were converted to 16-bit TIF files, applying Python 3.6.9 with libraries OpenEXR (1.3.2) (San Francisco, CA, USA), Numpy (1.16.6) (Cambridge, MA, USA), and OpenCV-Python (4.2.0.32) (Willow Garage, Menlo Park, CA, USA). Relative luminance values were calculated for each pixel in the 16-bit TIF files applying Equation ( 5 ), and the 16-bit relative monochromatic luminance values were coded over the three 8-bit RGB channels of a respective pixel and a new image was saved as an 8-bit TIF [ 25 ]. Hence, the new 8-bit relative luminance TIF image contains a wider dynamic range than a regular 8-bit RGB image, as all three channels carry the relative luminance data.…”
Section: Materials and Methodsmentioning
confidence: 99%
“…Via photogrammetric 3D reconstruction, 2D luminance images can also be utilized for obtaining a 3D luminance measuring of a measured indoor environment [ 25 ]. Still, photogrammetry can perform poorly when measuring the 3D geometry of smooth, mono-colored, and uniform surfaces [ 26 ].…”
Section: Introductionmentioning
confidence: 99%
“…Для сложных объектов ручное моделирование может потребовать нескольких недель рабочего времени, что делает 3D-моделирование довольно неэффективным. Применяя фотограмметрический процесс, последовательность изображений используется для восстановления геометрии пространства или объекта в 3D-модели [18]. В статье [19] рассматриваются измерения и моделирование зданий с использованием наземного лазерного сканирования, а в качестве вспомогательного метода проводилась ближняя фотограмметрия с беспилотного летательного аппарата.…”
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