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This paper presents the findings of a study conducted to measure the impact of JPEG 2000 lossy compression on the comparison of 1000 ppi latent fingerprint imagery and 1000 ppi exemplar fingerprint imagery. Combinations of image pairs that vary by the compression rate applied to one of the images in the pair are observed and analyzed. The impact of lossy compression to both Galton and non-Galton based features of a fingerprint is measured by professional judgment of expert fingerprint examiners. The impact of compression is analyzed by quantifying multiple decisions relative to different levels of loss incurred during image compression. In addition to measuring the perceived visual impact of compression on the aforementioned features of the fingerprint, this paper also looks at the impact of lossy compression on the examiner’s ability to correctly render their identification decisions.

Effects of JPEG 2000 Lossy Image Compression on 1000 ppi Latent Fingerprint Casework