HDR Imaging Photometers

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SphereOptics ProMetricSphereOptics has introduced a multi-exposure high dynamic range (HDR) feature for its I- and Y-Series ProMetric imaging photometers.

The HDR mode increases the dynamic range of the ProMetric camera up to 1,000,000:1. The newly developed algorithm achieves this range extension by combining separate images with different exposure times. This method increases the gray scale range of the image while lowering the noise level. The accuracy of the measured luminance has an error of ±3 percent for luminance and x-y color coordinates of ±0,003.

The multi-exposure HDR feature allows for a more accurate luminance analysis of a tested device featuring both low- and bright-light illumination levels.

Pictured is a comparison between a measurement with the multi-exposure HDR feature disabled (top) and enabled (bottom).

Published: February 2015
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