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Analysis of Land Cover Classes Using Unsupervised and Supervised Classification of Stennis Space ... - page 17 / 31

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Evaluate Classification  by Majority Filter

After the classification, there is a tendency to get a salt and pepper effect with some of the classes.  

Classification smoothing involves the application of a Majority Filter.

This operation  makes the image look good and it smoothes out the classes to give a better appearance.

The Majority Filter is conducted from the Image Interpreter icon to select GIS Analysis Neighborhood. This is done by placing Classified Image in the Input file. The output = new file name.

Majority Filter  is selected under the function 5 X 5 size and 7 x 7 from Neighborhood Definition. to compare the results. A Zero set in Stats and OK to run the process.

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