Envi 4.8 tutorial pdf
This will load a false color combination using WorldView-2 envi s NIR-2 Band in combination with the envi Green and Blue band.
We ll be using the WV-2 image we collected our ROIs.Envi provides a series of tools to satisfy envi these requirements.Sieve is usually run first to remove the isolated pixels based on a size tutorial (number of pixels) threshold, then clump is run to add spatial coherency to existing classes envi by combining adjacent similar classified areas.Left click within the zoom window to begin drawing your polygon.In this case we ve tutorial collect 6 envi classes in the image; Healthy Vegetation, Burn, Roads, tutorial Water, Man Made, and Soil. ROI Tool Begin to select regions of interest either in the your Image, your Scroll or Zoom windows.
You can load any type of band converter combination here.
In this case we ll use the Maximum Likelihood method Maximum likelihood classification assumes crack that the statistics for fighting each class your in each band are normally distributed and calculates the probability that a given pixel your belongs to a specific class.
Then click on Load RGB.The increased spectral fidelity of WorldView-2, combined with very high spatial resolution, will provide the additional data necessary to address the feature classification challenge.Go to File Open External File WorldView GeoTiff.Here we call it Fourmile_Classification.We ll output to a file the classification image.
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