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spatial_analysis_methods:fuzzy_logic

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spatial_analysis_methods:fuzzy_logic [2014/02/09 19:36]
jgh
spatial_analysis_methods:fuzzy_logic [2014/02/09 19:47] (current)
jgh [Remote Sensing Applications]
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 ===== Remote Sensing Applications ===== ===== Remote Sensing Applications =====
-Sharp delineations between ecological zones, landcover types, or elevation classes rarely occur in nature. ​ Fuzzy transitional zones can more realistically model what really occurs in natural landscapes (Tso and Mather, 2009, pp. 155 - 156).  With fuzzy logic, "​membership grade values are assigned that describe how close a pixel measurement is to the means of all classes"​ (Lillesand and Kiefer, p. 565).  Fuzzy supervised classification uses training sites that are heterogeneous containing mixed pixels. ​ The software can then assign membership grades in landcover categories such as "0.68 for class '​forest,'​ 0.29 for '​street,'​ and 0.03 for '​grass'"​ - the sum of the grades must total 1 (Lillesand, p. 565).   +Sharp delineations between ecological zones, landcover types, or elevation classes rarely occur in nature. ​ Fuzzy transitional zones can more realistically model what really occurs in natural landscapes (Tso and Mather, 2009, pp. 155 - 156).  With fuzzy logic, "​membership grade values are assigned that describe how close a pixel measurement is to the means of all classes"​ (Lillesand and Kiefer, p. 565).  Fuzzy supervised classification uses training sites that are heterogeneous containing mixed pixels. ​ The software can then assign membership grades in landcover categories such as "0.68 for class '​forest,'​ 0.29 for '​street,'​ and 0.03 for '​grass'"​ - the sum of the grades must total 1 (Lillesand, p. 565).  [[remote_sensing_methods:​object-based_classification|Object-based classification]] is one method of image classification that utilizes fuzzy logic. ​ Sub-pixel classification is another remote sensing application of fuzzy logic. ​ [[remote_sensing_methods:​spectral_mixture_analysis|Spectral mixture analysis]] and [[remote_sensing_methods:​multiple_endmember_spectral_mixture_analysis|multiple endmember spectral mixture analysis]] are two sub-pixel classification methods that leverage fuzzy logic.   
  
 ===== References ===== ===== References =====
spatial_analysis_methods/fuzzy_logic.txt ยท Last modified: 2014/02/09 19:47 by jgh