Help for COLORFIT

PURPOSE:
To fit a numerical model to a set of registered color images permitting
one of them to be predicted from the others. 
Once the coefficients relating the images are established they can be used
to predict the same spectral band from other image data.

EXECUTION:
colorfit inp=(in1,in2,in3)

METHOD:
Image three is to be predicted from images 1 and 2.
The model is: in3 = A * in1 + B * in2 + C + D * in1 / in2
Coefficients A-D will be printed out.

To then reconstruct image 3 use F2:
f2 inp=(in1,in2) out=in3 function="IN1*A+IN2*B+C+D*IN1/IN2"

HISTORY:
8-30-97  J Lorre. 
COGNIZANT PROGRAMMER:  Jean Lorre

PARAMETERS: