In fingerprint scanning technology, two
dimensional images are used to create multiple images of
small areas of finger. The images are overlapped hence a
complete image is formed. It is done by Discrete Wavelet
Transform (DWT). We can form spectral lines of same
wavelength for same topographical depth using Raman’s
effect. Basically it would be an array of three different
information which can provide three dimensional
structure of the finger through overlapping.