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Department: search.filters.department.Çankaya Üniversitesi,Fen Bilimleri Enstitüsü, Bilgisayar Mühendisliği Ana Bilim DalıHas files: No

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  • Master Thesis
    Fingerprint detection in digital images
    (2004) Fakılı, Defne
    Person identification from fingerprints is one of the most reliable techniques in identification systems the reason is that every person has got a unique fingerprint and it does not change with age. It preserves the same pattern characteristics from birth to death. Person identification from fingerprints goes back to early China. This thesis subject is mainly fingerprint detection and processing, but to mention it in detail; concerning a digital image with fingerprints and some other background (background with text) one part of the thesis is to detect and separate the fingerprints into another file. Another part of the thesis is to let fingerprints go through a preprocessing stage and pre-identification stages to make the fingerprint ready for identification stages. So the first three stages of fingerprint identification 111are discussed. These three stages are preprocessing, binarisation and thinning. All these two parts of this thesis will be discussed later in detail. The stages that the fingerprint has to go through are preprocessing, binarisation and thinning stages. In preprocessing noise is eliminated and the image is smoothed if needed. In binarisation the fingerprint image turns into an image consisting of only black and white colors. This means with no colors in the grayscale range, but only black and white colors. In thinning on the other hand, the lines in the fingerprint pattern go through a thinning process which makes the lines thinner but still visible.