
468 ENVI Extensions in IDL
FIGURE C.2
Radiometric normalization. (See color insert.)
case a histogram of tie-point distance ratios (see Section 5.6.2.5) is displayed
along with the number of detected tie-points (GCPs). The user c an abort at
this stage if an insufficient numbe r of tie-points have been found. Two imag e
files are created:
• a 4-band image consisting of the span of the first image chosen, the test
statistic − 2ρ ln Q, the associated change probability Pr(−2ρ ln Q) ≤ z
and the thresholded change probability at the desired significance;
• an ENVI classificatio n image for change and no-change at the chosen
significance level.
C.2.6.3 Scatterplot ...