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cas A NI 7 17) Double left-click on the B3 “reference” thumbnail to bring up the image view window containing the IRR image and two points, B3.apl and B3.ap2. These should be automatically placed in the same locations as for the D1 “reference” VIS image. Zoom in or out of the image as necessary by pressing “+” or “-” (or “i” or “o”) respectively. Note that the image will update in real time. T *F:\ Technical Imaging\ John Cupitt\zip files\bm4\bm-workspaces2.ws - align -lo)> Elle Edit View Tookits Help | input linear markup | viscalib | uvicalib | align | specden falsecolour uvistray uvkm_ vilstray vikm | results + A — B3.adjust - 17. Help 923888 32-bit float, 3 bands, XYZ, 115.33 MB, 9.45x9.45 pimm 1.75007 1.84127 2.00482 Magnit B2 CLP LD ECD ante B Match, default 026 023.targets B1.targets —n BD a earch Desktop (0S OO SG 118 18) Move these to indicate a pair of features which are recognisable in both images. Better accuracy is achieved if these points as far apart as possible. 19) Repeat the procedure for the VIL image by double left-clicking on the B3 “adjust” thumbnail and moving the points B3.bp1 and B3.bp2 (Figure 3-86) to the same locations as for the IRR image. 20) Test the accuracy of the alignment by double left-clicking on the B3 “test_alignment” thumbnail. Mathematically reconstructing the ambient stray radiation and subtracting it from the VIL image 21) Click on the “vilstray” tab. This uses the Spectralon diffuse reflectance standards in the VIL and corresponding IRR images to generate a mathematical reconstruction of the ambient stray radiation present in the VIL image (for more details see Chapter 1). 22) The positions of the Spectralon diffuse reflectance standards in VIL image are extracted from the alignments carried out in the “align” tab, as described above (Figure 3-87). Version No. 1.0 174 Date : 14/10/2013
