SBIR Phase II: Ballistics Matching Using Three Dimensional Images of Bullets and Cartridge Cases

* 9861361 Haynes这个小企业创新研究（SBIR）第二阶段项目将开发一个系统，用于测量子弹和弹壳上条纹的深度，并将这些数据用于计算机化弹道匹配分析。 当一把枪被发射时，子弹上的划痕会产生一个独特的特征，可以与同一把枪发射的其他子弹相匹配。 目前的条纹匹配技术是专有的“RotoScan”机器，它使用来自子弹图像的二维亮度数据。 它的错误匹配率很低，这是因为即使是同一把枪发射的子弹也往往只会在子弹表面的一小部分上匹配。 第一阶段确定了三维测量的可行性和深度数据用于弹道学匹配的实用性。 第二阶段将把条纹深度数据纳入自动弹道匹配作业，并将这些数据格式化，供区域或全国弹道数据库使用。 预计在测量硬件和分析软件方面的商业应用将成为一种有效的新执法工具。 用户将包括各级政府法医实验室的火器检验员。 ***

*** 9861361 Haynes This Small Business Innovation Research (SBIR) Phase II project will develop a system for depth measurement of striations on bullets and cartridge cases and for using these data in computerized ballistics matching analysis. When a gun is fired, the scratches made on a bullet create a unique signature which can be matched with other bullets fired from the same gun. The current striation-matching technology is the proprietary "RotoScan" machine, which uses two-dimensional luminance data from bullet images. Its poor false match rate arises from the fact that bullets fired from even the same gun will often match only over a small portion of a bullet's surface. Phase I established the feasibility of three-dimensional measurement and the utility of depth data for ballistics matching. Phase II will implement the integration of striation depth data in automated ballistics matching operations and format these data for use in regional or nationwide ballistics databases. Commercial applications are expected in the measurement hardware and analytical software for an efffective new law enforcement tool. Users would include Firearms Examiners in forensics laboratories at all levels of government. ***