Novel Approaches to Improve Iris Recognition System Performance Based on Local Quality Evaluation and Feature Fusion

Figure 6

Bar chart of image quality evaluation. (a) CASIA-V1 image, (b) CASIA-V3 Interval image, (c) one-dimensional entropy, (d) two-dimensional entropy, (e) Haralick texture entropy, (f) Tamura texture directionality measurement, (g) Tamura texture contrast measurement, and (h) gray variance.

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