基于虹膜的生物识别技术是一种最新的识别技术，通过一定的虹膜识别算法，可以达到十分优异的准确性。随着虹膜识别技术的发展，它的应用领域越来越宽，不仅在高度机密场所应用，并逐步推广到机场、银行、金融、公安、出入境口岸、安全、网络、电子商务等场合。在研究了虹膜识别算法，即预处理、特征提取和匹配的基础上，我们设计了一种可便携使用的基于FPGA的嵌入式虹膜识别系统。
2021-04-11 18:11:03
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为了提高虹膜识别的准确率，通过对虹膜图像进行处理，实现了对虹膜图像的准确定位，得到了增强的归一化图像；使用Haar小波变换进行了特征提取，通过采用K-means方法对小波特征数据进行聚类，实现了粗分类得到了小样本集虹膜图像；结合虹膜的纹理特点，通过使用Log-Gabor滤波器提取虹膜局部纹理特征，量化编码后形成了虹膜特征模板；然后在得到的小样本集内通过汉明距离计算虹膜特征模板的相似度，完成对虹膜图像的识别。实验结果表明，提出的虹膜识别方法有效地避免了虹膜匹配过程中因为虹膜数据库中种类多、数量多带来的计算量大、计算时间长的问题，提高了识别准确率。
2021-03-25 21:57:35
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The definitive work on iris recognition technology, this comprehensive handbook presents a broad overview of the state of the art in this exciting and rapidly evolving field. Revised and updated from the highly-successful original, this second edition has also been considerably expanded in scope and content, featuring four completely new chapters. Features: provides authoritative insights from an international selection of preeminent researchers from government, industry, and academia; reviews issues covering the full spectrum of the iris recognition process, from acquisition to encoding; presents surveys of topical areas, and discusses the frontiers of iris research, including cross-wavelength matching, iris template aging, and anti-spoofing; describes open source software for the iris recognition pipeline and datasets of iris images; includes new content on liveness detection, correcting off-angle iris images, subjects with eye conditions, and implementing software systems for iris recognition.
2021-03-20 19:25:29
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