[ACG45-P06] Estimation of chlorophyll-a from RGB digital camera data collected in Ise-Mikawa Bay
Keywords:Coastal region, Estimation of Chl.a concentration, RGB values, digital camera image, sea surface reflection
Thus, we attempted to develop estimation method for chlorophyll-a from RGB digital camera data for Ise-Mikawa Bay, Japan. For Ise-Mikawa Bay, method of estimation of chlorophyll a concentration form SeaWiFS and MODIS data was developed by Hayashi et al (2015), but estimation method with digital camera data was not developed yet.
We used chlorophyll-a concentration, RGB data from photo images of surface water, sky and a photographer’s 18% reflectance gray card during monthly survey cruises in Ise-Mikawa Bay. Spectral remote sensing reflectance data from RAMSES/TriOS was also obtained. We calculated RGB from spectral remote sensing reflectance data and compared RGB from digital camera. Digital camera RGB data was correlated with RGB from spectral data and in-situ chlorophyll-a concentration. In the future, we will reduce effect of reflection of sunlight from estimation of chlorophyll-a concentration using photographs of sky and gray card.
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