Iris image quality metrics with veto power and nonlinear importance tailoring
Iris image quality metrics with veto power and nonlinear importance tailoring
复制标题
具有否决权和非线性重要性定制的虹膜图像质量指标
DOI：
10.1049/pbse005e_ch4
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
C. Downing
中科院分区：
文献类型：
--
作者：
J. Daugman;C. Downing
用于评估生物特征样本质量的度量的线性组合是弱的，因为它们缺乏否决权。例如，眼睛图像的清晰聚焦的好分数将在加法组合中“补偿”眼睑完全闭合的事实;或者完全打开的眼睑将补偿图像许多屈光度的焦点外。标准化的乘法质量因子更好，因为它们是惩罚性的，从而赋予否决权。本章解释了ISO/IEC 29794-6虹膜图像样本质量标准中幂函数乘积的基础，特别是幂函数的指数如何允许对每个元素进行重要性定制。
Linear combinations of metrics for assessing biometric sample quality are weak, because they lack veto power. For example, a good score for a sharp focus of an ocular image would `compensate' in an additive combination for the fact that the eyelids are fully closed; or fully open eyelids would compensate for the image being many diopters out-of-focus. Normalised multiplicative quality factors are better because they are punitive, and thereby confer veto powers. This chapter explains the basis for the product of power functions which underlie the ISO/IEC 29794-6 Iris Image Sample Quality Standard, in particular how the exponents of the power functions allow importance tailoring of each element.