User Manual - pancroma

PANCROMA TM has a utility for regressing two independent variable (bands)against a third dependent variable band, i.e. solving the equationY = a + b 1 X 1 + b 2 X 2Where X1 and X2 represent the independent multispectral or hyperspectral bandfiles and Y represents the dependent band file. In order to compute the slopeand intercept terms, select ‘File’ | ‘Open’ and open the dependent (Y) band first,and then the X 1 and X 2 bands. (You must open the Y band first.) Then select‘PreProcess’ | ‘Multiple Regression’ | ‘Two Independent Variables’. When theData Entry box becomes visible, select the sampling interval as discussed above.The linear coefficient terms will be reported to the diagnostic screen on the MainWindow. They will also automatically be inserted into the Data Entry Form forsubsequent use for linear transformations. Note that zero values are ignored.This is to prevent the intercept from being skewed as a result of zero value collarpixels.PANCROMA TM also has a utility for regressing three independent variable(bands) against a third dependent variable band, i.e. solving the equationY = a + b 1 X 1 + b 2 X 2 + b 3 X 3Where X1, X2 and X3 represent the independent multispectral or hyperspectralband files and Y represents the dependent band file. In order to compute theslope and intercept terms, select ‘File’ | ‘Open’ and open the dependent (Y) bandfirst, and then the X 1 , X 2 and X 3 bands. (You must open the Y band first.) Thenselect ‘PreProcess’ | ‘Multiple Regression’ | ‘Three Independent Variables’.When the Data Entry box becomes visible, select the sampling interval asdiscussed above. The linear coefficient terms will be reported to the diagnosticscreen on the Main Window. They will also automatically be inserted into theData Entry Form for subsequent use for linear transformations. Note that zerovalues are NOT ignored for the three independent variable case. As a result it isnecessary to subset the band files so that no-data collar pixels do not skew theregression intercept.PANCROMA TM also has a utility for regressing four independent variable (bands)against a third dependent variable band, i.e. solving the equationY = a + b 1 X 1 + b 2 X 2 + b 3 X 3 + b 4 X 4Where X1, X2, X3 and X4 represent the independent multispectral orhyperspectral band files and Y represents the dependent band file. In order tocompute the slope and intercept terms, select ‘File’ | ‘Open’ and open thedependent (Y) band first, and then the X 1 , X 2 , X 3 and , X 4 bands. (You must openthe Y band first.) Then select ‘PreProcess’ | ‘Multiple Regression’ | ‘FourIndependent Variables’. When the Data Entry box becomes visible, select the206