June 2014
Intermediate to advanced
576 pages
16h 43m
English
book
Image Analysis, Classification and Change Detection in Remote Sensing, 3rd Edition
by Morton J. Canty
Content preview from Image Analysis, Classification and Change Detection in Remote Sensing, 3rd Edition
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374 Change Detection
Listing 9.2: Iterated principal components (continued).
1 U[ frozen ,0] = 1.0
2 U[ frozen ,1] = 0.0
3 FOR j =0 ,1 DO U [* , j ]= U [* , j ]/ t otal (U ,2)
4 EM , PCs [1 ,*] , U , Ms , Ps , Fs , T0 =0 , $
5 unfr ozen = unf rozen
6 ; weighted covariance matrix
7 covpm - > update , bitemp , wei ghts =U [* ,0]
8 C = covpm - > c ovaria nce ()
9 eivs = ei genql (C, eigenve ctors =V , / do uble )
10 OPLOT , [ -1 ,1] ,[ - abs ( V [0 ,1]/ V [0 ,0]) , $
11 abs ( V [0 ,1]/ V [0 ,0])] , li nestyl e =2 , color =0
12 PCs = bit emp ## transpose ( V)
13 iter ++
14 END UNTIL iter GE niter
15
16 ; retu rn resu lt to ENVI
17 out_ar ray = fltarr ( num_cols
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