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Dark Object Subtraction of Landsat MSS Satellite Images | ||
| Journal of University of Babylon | ||
| Article 1, Volume 21, Issue 8, 2013, Pages 2844-2853 | ||
| Abstract | ||
| Solar radiation reflected by the Earth’s surface to satellite sensors is modified by its interaction with the atmosphere. In this research, Dark Object Subtraction ( DOS) have been applied to reduce the atmospheric effects . The principle of the DOS based on the signal reaching the satellite sensors from a dark object, especially the atmosphere at visible wavelengths. Therefore, the pixels of dark targets indicating the amount of upwelling path radiance in this band. The atmospheric path radiance has been added to the surface radiance of the dark target to give the true target radiance at the sensor. A suitable dark target, such as a deep water is selected in the studied area of this research. Moreover, histogram method has been used for calculate the mean, most probable, standard deviation, and maximum values which can then be considered as path radiance , then have been subtract from each spectral band for original image. The most suitable value selected as a path radiance is the most probable value. | ||
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