Study And Analysis Of Methods To Eliminate Eclipse Impact On The Satellite VIS Imagery

Solar eclipse happens occasionally so that an obvious shadow appears on the satellite VIS imagery. Thus, the information on the imagery could not be analyzed and used. For this reason, it is necessary to correct the region of solar eclipse shadow on the cloud image.This paper is composed of two parts including 5 chapters. In the first part (including chapter 2^ 3), this paper explains an improved geometry-model method to eliminating eclipse shadow, using satellite imaging theory and projection theory to convert plane rectangular coordinates into rectangular spherical coordinates. Otherwise, through studying eclipse's shape and size, this paper uses a math-function-model to eliminating eclipse shadow.In the second part (including chapter 4), this paper applies Gray Level Coocurrence Matrix and image texture feature quantities to evaluate eliminate effect through computing the same sampling region selected.The results show that the three methods can eliminate solar eclipse impact on the satellite VIS imagery so that the topography, cloud system texture and ocean current are distinct and differentiable and it is good for analyzing the clouds and weather systems on the cloud image. Comparing the three methods, the improved geometry-model method is the most effective. Original geometry-model method is the worst. The math-function-model method is faster and simpler, but it involves many subjective factors.