The experimental paper on a digital camera has been published by us in the Proceedings of Civil Engineering in the Ocean, 1994. In published paper, Standard CIE chromaticity analyses were applied to the measurement of upwelling irradiance spectra expressed as transparency and suspended solid amounts using the digital camera and satellite (Landsat-5/TM) data. In this paper, the authors make the model of water quality in the Omura bay using digital camera. And also, proposed CIE chromaticity was used to make water quality model. The transparency model of correction mode was analyzed the correlation coefficient of 0.81. Result using single band model was compared to the result from multi band model. Limitations of each model are discussed using proposed model for water quality of the Omura bay, Nagasaki Prefecture, Japan.
The band-to-band registration errors were recognized in the ADEOS/OCTS level 1B1 images which were generated by the nearest neighbor (NN) method. It is very suspicious whether the results by band-to-band operation like ratioing, NDVI computation, etc. using such images can reflect the actual conditions of the ground. In this paper, the influences of band-to-band registration errors on NDVI were examined utilizing the simulated images from Landsat TM images. Two types of NDVI values were compared. One is derived from the simulated images by the bi-linear (BL) method, the other from that by the NN method. The comparison proved the BL interpolation was more effective than the NN method for mitigating the effect of band-to-band registration errors on NDVI.