ENH: added applications and images for the unmixing part

Documentation/Cookbook/rst/recipes/hyperspectral.rst

 Hyperspectral image processing
 ==============================
 
+
+.. figure:: ../Art/HyperspectralImages/cuprite_rgb.png
+
+   Cuprite image considered, here bands 16, 100 and 180 are displayed.
+
+
+
 Unmixing
 --------
 
+::
+
+    otbcli_EndmemberNumberEstimation  -in inputImage
+                                      -algo vd 
+                                      -algo.vd.far 1e-5
+
+
+::
+
+    otbcli_VertexComponentAnalysis  -in inputImage
+                                    -ne 19 
+                                    -outendm endmembers.tif
+
+::
+
+    otbcli_HyperspectralUnmixing  -in inputImage 
+                                  -ie endmembers.tif 
+                                  -out unmixedImage.tif
+                                  -ua ucls
+
+.. figure:: ../Art/HyperspectralImages/hyperspectralUnmixing_rgb.png
+
+   Resulting unmixed image, here the first three bands are displayed.
+
+
 Anomaly detection
 -----------------