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Despeckle Dialog
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| · | the maximum horizontal size of speckle fragment to delete;
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| · | the maximum vertical size of speckle fragment you want to delete;
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| · | the kind of despeckling (either Standard or Smart or Zonal);
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| · | the side lenght of the square area (tile) used for analyzing the image;
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| · | the mimum number of black points for each tile; under this value zone is considered speckle;
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