BASE-LINE CORRECTION OF SPECTRA IN FOURIER-TRANSFORM INFRARED - INTERACTIVE DRAWING WITH BEZIER CURVES

A baseline correction tool using the method of Bezier has been develop ed to permit the drawing of curves in a manner that allows full contro l of the line curvatures by the user. The basic concepts and principle of the Bezier algorithm are explained as well as the modifications th at were made to take into account the limitations imposed by the treat ment of spectral data. The application of this particular curve drawin g routine to an existing baseline correction module offers facilities and extended capabilities that typical polynomial methods using least- squares fitted lines cannot attain. The examples of applications that are given demonstrate how this method can be performed, as well as its efficiency.