Automatic histogram in ossim-orthogen fails if bands are specified out of order

[rddesmond]

Given an multispectral, image with geospatial coordinates (we used a chip from a Digital Globe image), ossim-orthogen does not correctly apply a histogram correction if we specific a band selection other than "1,2,3" (in the example, we take the first 3 bands, but reverse them) and the histogram is not explicitly calculated.

The following command creates a histogram, but it is incorrect (with our test data, the red band was much more intense than the others):

ossim-orthoigen -w ossim_png --output-radiometry U8 --hist-auto-minmax 'in.TIF|0|3,2,1' out.png

If we explicitly create the histogram first, the resulting output is correct:

ossim-create-histo in.TIF ossim-orthoigen -w ossim_png --output-radiometry U8 --hist-auto-minmax 'in.TIF|0|3,2,1' out.png

(The PNG output was for convenient testing.)

This was testing using: ossim-orthoigen 1.8.18 20150316