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westSimilarity Distribution Between Correlated Samples

Jun 7, 2024 13:06 PM - Jun 7, 2024 13:06 PM, Neal Schrode, Firearms, Section Presentation

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This presentation explores the core principles governing similarity score distributions generated by correlation functions within 3D ballistic imaging systems. These systems utilize computer algorithms to compute similarity scores, reflecting the degree of resemblance between two bullets or cartridge cases. The presentation aims to offer an introductory understanding of the interpretive significance of these scores, particularly in the context of comparing samples from the same and different sources.
Throughout this presentation, emphasis will be placed on how similarity scores aid in comparing samples originating from the same source. Firearms examiners can use these scores to identify common patterns and characteristics indicative of shared origins. Additionally, the discussion extends to the comparison of samples from different sources, highlighting the utility of similarity scores in detecting variations and discrepancies essential for firearms examination.
Moreover, the presentation delves into the practical applications of similarity scores in recommending potentially related samples within search databases. By leveraging these scores, investigators can efficiently navigate through vast data sets, pinpointing potential matches and associations. This functionality underscores the crucial role of similarity scores in expediting the discovery of pertinent evidence, thereby enhancing the effectiveness of forensic investigations.
In summary, this presentation provides a comprehensive overview of the fundamentals of similarity score distributions in 3D ballistic imaging systems, a new technology that is emerging in the field. By revealing their interpretive significance and practical implications, it will equip examiners with essential knowledge for optimizing firearms and toolmark analysis and advancing investigative outcomes. This understanding is vital for enhancing the efficiency and accuracy of forensic examinations in various criminal investigations.