Abstract
During a survey of Norwegian lakes, photographic records were made of lake color as reflected by a white Secchi disk positioned at half of the depth of extinction. The pictorial distinction between different lakes is documented in this article. The pictures recorded can readily be transferred to a color model [e.g., Commission Internationale de L’Éclairage (CIE)-Lab]; from there, numerical color parameter values such as hue (h*, the quality of color) and chroma (C*, the intensity of color) may be assigned to each record. There are, however, limitations and obstacles connected with the transformation of color values recorded by a CCD camera (or film digitizers) to absolute numerical values comparable between different cameras and systems. A single CCD camera may be useful for documenting lake color, but there are technical limitations restricting its use as a scientific instrument for quantitative purposes.
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Klaveness, D. Photography in limnology: documentation of lake color using a CCD camera. Limnology 6, 131–136 (2005). https://doi.org/10.1007/s10201-005-0147-8
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DOI: https://doi.org/10.1007/s10201-005-0147-8