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Using Hair Follicles with Leg Geometry to Align Androgenic Hair Patterns

机译：使用具有腿部几何形状的毛囊来对齐雄激素发型

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Identifying criminals and victims, including but not limited to masked gunmen, rioters, paedophiles, and victims of sexual offenses in digital images can be a challenging forensic task because often, neither their faces nor tattoos are observable. Though skin marks and vein patterns provide new ways to identify them, new biometric traits are still demanded because skin marks on some subjects are limited and clear vein patterns are difficult to be obtained from people with high concentration of body fat or melanin. They can be covered by androgenic hair. A recent paper indicated that androgenic hair patterns extracted from lower legs can be used for personal identification and demonstrated their effectiveness. However, it neglected the importance of alignment before matching two patterns. To alleviate this alignment problem, leg geometry was proposed for low resolution androgenic hair patterns. For aligning androgenic hair patterns in high resolution images which may be obtained from child sexual abuse images and rioter images taken by reporters, in this paper, a new feature, androgenic hair follicles, is proposed to combine with leg geometry to achieve high alignment accuracy. With this new feature, a new alignment algorithm is developed. Experiments on 1,138 high resolution images from 283 different legs show that the proposed alignment algorithm provides improvements of 5%-10% on different experimental settings.
机译：在数字图像中识别罪犯和受害者，包括但不限于戴面具的枪手，暴徒，恋童癖者以及性犯罪的受害者，可能是一项具有挑战性的法医任务，因为通常无法观察到他们的脸部或纹身。尽管皮肤痕迹和静脉纹提供了识别它们的新方法，但由于某些对象的皮肤痕迹有限并且难以从体内脂肪或黑色素含量高的人获得清晰的静脉纹，因此仍需要新的生物特征。它们可能被雄激素的头发覆盖。最近的一篇论文表明，从小腿中提取的雄激素型毛发可用于个人识别，并证明了其有效性。但是，它忽略了在匹配两个模式之前对齐的重要性。为了缓解这种对齐问题，提出了针对低分辨率雄性头发样式的腿部几何形状。为了使高分辨率图像中的雄激素头发图案对齐（可从记者的儿童性虐待图像和骚乱者图像中获得），本文提出了一种新功能，即雄激素毛囊与腿部几何形状相结合，以实现较高的对齐精度。利用这一新功能，开发了一种新的对齐算法。在283条不同的腿上的1138张高分辨率图像上进行的实验表明，所提出的对齐算法在不同的实验设置下可提高5％-10％。

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