Seal object detection in document images using GHT of local component shapes

Roy, Partha Pratim; Pal, Umapada; Lladós, Josep

doi:10.1145/1774088.1774094

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…The query is used to find similar symbols in the database. Examples of such approaches can be found in [14]. Symbol spotting approaches could be used to distinguish between known stamps and forged stamps with the same content but different layout.…”

Section: Related Workmentioning

confidence: 99%

Stamp Verification for Automated Document Authentication

Micenková

Beusekom

2015

Computational Forensics

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Abstract. Stamps, along with signatures, can be considered as the most widely used extrinsic security feature in paper documents. In contrast to signatures, however, for stamps little work has been done to automatically verify their authenticity. In this paper, an approach for verification of color stamps is presented. We focus on photocopied stamps as nongenuine stamps. Our previously presented stamp detection method is improved and extended to verify that the stamp is genuine and not a copy. Using a variety of features, a classifier is trained that allows successful separation between genuine stamps and copied stamps. Sensitivity and specificity of up to 95% could be obtained on a data set that is publicly available.

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Section: Related Workmentioning

confidence: 99%

Stamp Verification for Automated Document Authentication

Micenková

Beusekom

2015

Computational Forensics

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“…A method for seal object detection in document images is presented in [9]. Generalized Hough Transform is used to detect the seal and based on voting seal object is located.…”

Section: Related Workmentioning

confidence: 99%

A Generic Method for Stamp Segmentation Using Part-Based Features

Ahmed

Liwicki

Dengel

2013

2013 12th International Conference on Document Analysis and Recognition

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Traditionally, stamps are considered as a seal of authenticity for documents. For automatic processing and verification, segmentation of stamps from documents is pivotal. Existing methods for stamp extraction mostly employ color and/or shape based techniques, thereby limiting their applicability to only colored and specific shape stamps. In this paper, a novel, generic method based on part-based features is presented for segmentation of stamps from document images. The proposed method can segment black, colored, unseen, arbitrary shaped, textual, as well as graphical stamps. The proposed method is evaluated on a publicly available dataset for stamp detection and verification and achieved recall and precision of 73% and 83% respectively, for black stamps which were not addressed in the past.

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“…Roy et al, applied GHT (Generalized Hough Transform) of local component shapes to extract seal imprints [8] . A seal imprint is characterized by scale and rotation invariant spatial feature descriptors (distance and angular position) computed from recognition result of individual connected components (characters).…”

Section: Related Workmentioning

confidence: 99%

Seal imprint segmentation based on color feature classifier

Liu

et al. 2012

2012 International Conference on Audio, Language and Image Processing

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Seals play an important role in modern society. Many researches have been investigated on the topic of automatic seal forgery identification in computer vision community. This paper puts the interest focusing on seal imprint segmentation in the real documents with cluttered background. A classification based approach has beenproposed. An image pixel is classified as imprint or non-imprint depended on the output score of color feature classifier, which trained using HS-SIFT representation to the pixel under a Support Vector Machine frame. The experiments demonstrate the feasibility of the proposed method.

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Seal object detection in document images using GHT of local component shapes

Cited by 8 publications

References 10 publications

Stamp Verification for Automated Document Authentication

Stamp Verification for Automated Document Authentication

A Generic Method for Stamp Segmentation Using Part-Based Features

Seal imprint segmentation based on color feature classifier

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