GMS雲画像の船舶へのディジタル伝送に関する基礎的研究

概要

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In order to analyze weather conditions, it is useful to get GMS images with a high brightness resolution. As the data volume is very large, the data compressionis indispensable to transmit them to ships and/or save them. The authors propose an effective approach for lossless compression of them. The gradation level of each pixel is predicted from that of ones around the pixel by means of a linear predictor in the first stage. The prediction errors are converted again into residue sequence by means of two-dimensional nonlinear predictor in the second stage. The residue sequence is coded by Huffman method in the final stage. The GMS data is suppressed to so small as 32% by this method. It is found that the GMS data can be transmitted in 93s by the transmission line of WEFAX (weather facsimile).
社団法人日本航海学会の論文
1994-03-25