Fingerprint acts as the most powerful tool for identifying people because the ridge patterns of every print are unique and immutable. Fingerprint impressions fall into three categories, such as plastic, visible and latent prints. Plastic prints are three dimensional and resulted from the contact of finger with semisolid substances like clay, wax, etc. [1–4]. Visible prints do not require further enhancement to get visualised, while latent fingerprints are invisible by themselves and thus requires enhancements for visualisation and identification.
Methods of detection of latent fingerprints include optical, physical and chemical or a combination of them. They
involve exploitations of the differences in characteristics of the fingerprints and the substrates on which they are found [2]. Application of fluorescence techniques, dusting and the use of chemical reagents are just some of the techniques used. Particularly, the laserinduced fluorescence approach along with optical filtering to latent fingerprint detection has wide applicability and is compatible with numerous conventional detection methods [5]. However, this approach demands for the weaker background fluorescence. Also, it requires substantial wavelength difference between the background and fingerprint fluorescence to enable the use of optical filters in order to suppress the unwanted
background fluorescence [5].