Reconstruction Algorithm of Iris Image with Great Depth of Field Based on Multi-focus Fusion

This paper presents a new reconstruction algorithm of iris image with great depth of field. First, the focus issue in image capture process is proposed, and characteristic of multi-focus iris image is discussed, which proves the feasibility of reconstruction of iris image with great depth of field based on multi-focus fusion. The proposed method uses antisymmetric biorthogonal wavelet to detect the iris texture edge, and according to the density of edge pixels, chooses the iris sub-regions of high articulation for image fusion. Finally, experimental data set compared with traditional non-fusion method is presented, and the proposed method shows its advantages in performance and practical value in registration process.