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AN ASSESSMENT OF HIGH DYNAMIC RANGE LUMINANCE MEASUREMENTS WITH LED LIGHTING

机译:LED照明的高动态范围亮度测量的评估

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This study investigates whether High Dynamic Range Imaging (HDRI) can accurately capture luminance values of a single LED chip. Two conventional methods of determining luminance (the use of a luminance meter with a close-up lens, and deriving luminance from illuminance measurements, source area and distance) of a single LED chip are compared to HDRI. The results of this research shows that HDRI using a Canon EOS 7D camera, fitted with 28-105 mm lens and a neutral density filter (with less than 1% transmittance) combined with Photosphere compares very well to a luminance value determined with goniophotometer measurements and calculations providing confidence in HDRI's ability to capture luminance values of a single LED chip.
机译:这项研究调查了高动态范围成像(HDRI)是否可以准确捕获单个LED芯片的亮度值。将确定LED芯片的两种常规方法(使用带有近摄镜头的亮度计,并从照度测量,光源面积和距离得出亮度)与HDRI进行了比较。这项研究的结果表明,使用佳能EOS 7D相机(配备28-105毫米镜头和中性密度滤光片(透射率小于1%))与Photosphere结合使用的HDRI与通过测角光度计测量得到的亮度值和计算结果使人们对HDRI捕获单个LED芯片的亮度值的能力充满信心。

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