ランドサットTMデータによる船舶の観測

概要

論文の詳細を見る
This paper offers a method for observing vessels in a wide area by using LANDSAT TM data whose resolution is 30m. The observation from the satellite is restricted by time or weather conditions, but has many advantages such as the high resolution, fitness to process data automatically and so on. The process to recognize vessels has three steps. That is, 1) bands 1, 3 and 5 which have large distances of brightness between sea and vessels are chosen and composed with the weight 2:1:1. 2) A modified median filtering technique is adapted for reducing the bias influenced from the sea face with pollusion. This step is effective to enhance the shapes of vessels. 3) The low level reflection under some conditions is accumulated to discriminate small vessels from noise. As the results, small vessels like tug boats in a harbor area are able to be recognized.
1987-03-25