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| Content Provider | ACM Digital Library |
|---|---|
| Author | Merkel, Ronny Vielhauer, Claus |
| Abstract | Determining the age of latent fingerprints found at crime scenes is a very pressing, yet so far unresolved challenge in forensics. Recently, a first aging feature called binary pixel has been introduced, based on the loss of image contrast of fingerprint time series captured non-invasively with a Chromatic White Light (CWL) sensor. Such new feature seems to be promising, showing a logarithmic behavior for fingerprints when aging. However, a CWL sensor is very expensive, bulky and comparatively slow in the acquisition. We here explore the possibility of using a common flat bed scanner as a cheaper, more flexible and faster alternative to the CWL technique. Comparing 250 fingerprint time series scanned in regular time intervals over a period of 24 hours with a CWL sensor as well as a flat bed scanner (18000 scans in total), our conclusions are threefold: firstly, the binary pixel feature can reliably be produced with a flat bed scanner for scan images of sufficient quality according to our subjective quality metric defined in this paper. Secondly, however, only 24% of flat bed scanner images are of high quality, clearly showing the much higher reliability of CWL results. Thirdly, the experiments furthermore indicate that the binary pixel feature is not sensor specific and can be applied to different image sensors. |
| Starting Page | 39 |
| Ending Page | 46 |
| Page Count | 8 |
| File Format | |
| ISBN | 9781450314176 |
| DOI | 10.1145/2361407.2361415 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2012-09-06 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Binary pixel Flat bed scanner Age determination Chromatic white light sensor Latent fingerprints Crime scene forensics |
| Content Type | Text |
| Resource Type | Article |
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