The biorthogonal wavelets are used in this study (Gonzales, 2004), (Prasad, 1997) as a tool for iris recognition problem. Two techniques are applied. Two-dimensional and one dimensional biorthogonal wavelet filters are used.
The first technique (Xu, 1994), (Chang, 2000) implies procedure with an image converted to gray image. Even though the processing of Red component of images has shown the best results, in this case the procedure of gray images appeared to give superior results. Every image is processed as a two-dimensional m×n matrix image. The two-dimensional biorthogonal wavelets are applied to gray images.