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How are wildfire contours generated?

April 26, 2017contours Wildfire

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How are wildfire contours generated?

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When a section is first opened it is assigned an arbitrary threshold of 160, but the user can select any value from 0-255 by using the slider in the Contrast Dialog. In the default mode, wildfires will expand into all four-connected pixels that are greater than the threshold. By using the Configure-Wildfires submenu the user can change the mode of expansion. “More” changes the algorithm to expand into all eight-connected neighbors. “Less” changes the algorithm to expand into only those four-connected pixels that also have a neighboring above-threshold pixel.