Up to 10 multispectral registered input images.
Three byte output images in the order: r,g,b
(Only required to create a new color calibration file.)
A table of color calibration values. The values come in groups of 5 in
the order: line1,sample1,r1,g1,b1, line2,sample2,r2,g2,b2, ...
Each group of 5 values represents a known color in the scene. There
must be at least two more colors than input files.
Line and sample refer to the image location of a known color whose
output (desired) dn values will become r, g, b. You may, instead of
r,g,b, enter the X,Y,Z tristimulus values. Then the output files
will be in X,Y,Z units (and you should specify format=real).
This keyword causes the calibration values to be written to a file.
If "color" is not specified then the calibration file is read and
these values will be used on the input files.
Area specifies the dimension of a square box n by n pixels within which the mean dn will be computed. The boxes are located at the line,sample locations indicated in the "color" keyword. Default is 6.