1.1 本实践描述了处理探针图像以最大化面部识别系统(FRS)搜索返回潜在候选的可能性的步骤。 1.2 该实践没有解决手动检查的必要步骤和过程。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.4 本标准不能取代通过适当的教育、培训和经验获得的知识、技能或能力，应与合理的专业判断一起使用。 1.5 本国际标准是根据《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的被世界贸易组织技术性贸易壁垒（TBT）委员会起诉。 ======意义和用途====== 5.1 满足商定的国际标准（例如ISO/IEC 19794-5:面部图像数据）的图像通常可以提交给FRS以在很少或没有操作员干预的情况下进行搜索。 5.2 手动处理对于次优图像(例如，低分辨率、严重压缩或对象的姿势、照明或表情是非中性的)可能是有益的。本实践中提出的处理技术可以应用于整个图像或局部区域。然而，一些图像可能退化到手动处理不会改善FR搜索结果的程度。 5.3 本实践中介绍的图像处理主题并不旨在覆盖保持图像法医质量的建议-一对一的比较。这些过程特别适用于准备面部图像以作为探测提交到自动FRS中，从而最大化潜在候选将在搜索结果集中返回的可能性。 5.4 任何图像处理的目标应该是优化图像以供FRS搜索，而不是创建美观的图像。由于在供应商特定算法内完成的图像处理，看起来“好”的图像不一定与为FRS使用而优化的图像相同。 5.4.1 任何手动图像处理的效果将随着不同的FR而变化，并且在某些情况下，可能会降低性能而不是提高性能。 5.4.2 在FRS搜索之前对探针图像的图像处理不同于为一对一手动比较而执行的操作过程。5.4.3 关于从FRS搜索返回的候选是否来自与探测图像相同的源的任何决定必须基于与原始(未编辑)图像而不是处理过的图像的比较来做出。 5.4.4 应始终保留机构特定或授权的注释和审计跟踪。

1.1 This practice describes the steps to process a probe image to maximize the likelihood that a facial recognition system (FRS) search returns a potential candidate. 1.2 The practice does not address the necessary steps and processes for a manual examination. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This standard cannot replace knowledge, skill, or ability acquired through appropriate education, training, and experience and should be used in conjunction with sound professional judgment. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Images that meet agreed upon international standards (such as ISO/IEC 19794-5: Face Image Data) can normally be submitted to an FRS for searching with little or no operator intervention. 5.2 Manual processing may be beneficial for sub-optimal images (for example, low resolution, heavily compressed, or where the subject’s pose, illumination, or expression are non-neutral). The processing techniques presented in this practice may be applied over an entire image or in localized areas. However, some images may be degraded to the extent that manual processing will not improve the FR search outcome. 5.3 The image processing topics presented in this practice are not intended to override recommendations for maintaining the forensic quality of images intended for a one-to-one comparison. These processes specifically apply to preparing a facial image to submit as a probe into an automated FRS maximizing the likelihood that a potential candidate will be returned in a search result set. 5.4 The goal of any image processing should be to optimize the image for searching by the FRS, not to create an aesthetically pleasing image. An image that looks ‘good’ is not necessarily the same as one optimized for use by an FRS due to image processing done within vendor specific algorithms. 5.4.1 The effect of any manual image processing will vary with different FRS and, in some cases, may degrade performance rather than improve it. 5.4.2 Image processing to the probe image before an FRS search differs from the operational processes performed for a one-to-one manual comparison. 5.4.3 Any decision regarding whether a candidate returned from an FRS search is from the same source as the probe image must be made based on a comparison with the original (unedited) image and NOT the processed image. 5.4.4 Agency-specific or mandated notes and audit trails shall be maintained at all times.