A baseline correction tool using the method of Bezier has been developed to permit the drawing of curves in a manner that allows full control of the line curvatures by the user. The basic concepts and principle of the Bezier algorithm are explained as well as the modifications that were made to take into account the limitations imposed by the treatment of spectral data. The application of this particular curve drawing 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.
Alain Koch and Jean-Victor Weber, "Baseline Correction of Spectra in Fourier Transform Infrared: Interactive Drawing with Bezier Curves," Appl. Spectrosc. 52, 970-973 (1998)
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