Syam, R., M. Hariadi, and M. H. Purnomo. “Determining the Standard Value of Acquisition Distortion of Fingerprint Images Based on Image Quality”. Journal of ICT Research and Applications, vol. 4, no. 2, Nov. 2010, pp. 115-32, doi:10.5614/itbj.ict.2010.4.2.4.