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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120 Transformations
Listing 3.8: Estimation of the noise cova riance matrix in IDL from the differ-
ence of one-pixel shifts.
1 PRO e x3_4
2 envi_se lect , title = ’ C hoose multispe ctral ima ge ’ , $
3 fid = fid , dims = dims , pos = pos
4 IF ( fid EQ -1) THEN BEGIN
5 PRINT , ’ C ancele d ’
6 RETURN
7 ENDIF
8 IF n_ele ments ( pos ) LT 2 THEN BEGI N
9 PRINT , ’ Abor ted ’
10 Message , ’ S pectra l subset size must be at leas t 2 ’
11 END IF
12 envi_f ile_qu ery , fid , fnam e = fna me
13 cols = dims [2] - dims [1]+1
14 rows = dims [4] - dims [3]+1
15 ban ds = n_e lement s ( pos )
16 ; data mat rix for diff erence ima ge
17 D = fl tarr ( bands
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