bedrich_camCalAndImgCorr_v4 (3).pdf (597.44 kB)
Download fileElectroluminescence imaging of PV devices: camera calibration and image correction
conference contribution
posted on 2016-10-17, 13:55 authored by Karl Bedrich, Martin BlissMartin Bliss, Tom BettsTom Betts, Ralph GottschalgA method for the correction of electroluminescence (EL) images of PV devices is presented. This includes a camera calibration based on focus, dark current, flat field and lens distortion as well as artefact removal, including single-time-effects and erroneous pixels. Image correction allows EL images taken with different systems or perspectives to be normalized and used for quantitative analysis. Results include an image correction of a 4x9 cell module, imaged in different perspective positions. After correction, intensity difference and positional error were found to be less than 1%, respective 2%.
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