ดาวน์โหลดงานนำเสนอ
งานนำเสนอกำลังจะดาวน์โหลด โปรดรอ
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ผู้ให้สัมมนา นายธเนศ เกษศิลป์ รหัส 51312306 ภาควิชานิติวิทยาศาสตร์
คณะวิทยาศาสตร์ มหาวิทยาลัยศิลปากร
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Reconstructing shredded documents through feature matching
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Introduction
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Wolfson Kong and Kimia Leitao and Stolfi Bunke and Kaufmann Bunke and Buehler Uc¸oluk and Toroslu
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1. Introduction 2.presents an overview of the proposed methodology. 3.describes the feature set we have used to carry out the local matching. 4.shows how we compute the similarity between the polygons as well as the global search algorithm. Finally 5. reports the experimental results and Section 6. present some perspectives of future works and concludes this work.
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Different kinds of shredding.
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The block diagram of the proposed methodology
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Inner and outer boundaries produced by shredding
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Inner and outer boundaries produced by shredding.
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Angle features extracted from the polygon.
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Description of the feature vector
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Similarity between angles.
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Distance features extracted from the polygon.
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Best matching (a) fragments i and j and (b) new fragment Fij where three vertices were removed.
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Steps of the document reconstruction.
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Examples of the documents in the database.
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Examples of a document totally reconstructed: (a) fragments and (b) document reconstructed.
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Performance of the proposed methodology in reconstructing documents shredded by hand.
3–16 fragments 1 cm x 1 cm to 5 cm x 5 cm
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