Automatic segmentation of latent fingerprints

Latent fingerprints are routinely found at crime scenes due to the inadvertent contact of the criminals' finger tips with various objects. As such, they have been used as crucial evidence for identifying and convicting criminals by law enforcement agencies. However, compared to plain and rolled prints, latent fingerprints usually have poor quality of ridge impressions with small fingerprint area, and contain large overlap between the foreground area (friction ridge pattern) and structured or random noise in the background. Accordingly, latent fingerprint segmentation is a difficult problem. In this paper, we propose a latent fingerprint segmentation algorithm whose goal is to separate the fingerprint region (region of interest) from background. Our algorithm utilizes both ridge orientation and frequency features. The orientation tensor is used to obtain the symmetric patterns of fingerprint ridge orientation, and local Fourier analysis method is used to estimate the local ridge frequency of the latent fingerprint. Candidate fingerprint (foreground) regions are obtained for each feature type; an intersection of regions from orientation and frequency features localizes the true latent fingerprint regions. To verify the viability of the proposed segmentation algorithm, we evaluated the segmentation results in two aspects: a comparison with the ground truth foreground and matching performance based on segmented region. © 2012 IEEE.

A atualidade da criminalização produzida sobre o Movimento dos Trabalhadores Sem Teto – MTST: o caso do acampamento Chico Mendes

Pós-graduação em Ciências Sociais - FFC

Candido Mota e a política de atendimento a menores delinquentes no Estado de São Paulo, 1894-1909

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Criminalidade e relações de poder em Mato Grosso (1870-1910)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Os espaços de medo e os de castigo nas pequenas cidades do estado de São Paulo: o caso Itirapina

Pós-graduação em Geografia - IGCE

Apontamentos sobre a história constitutiva dos saberes crimino-penais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Trabalho com redução à condição análoga à de escravos e ofensa à dignidade da pessoa humana: tráfico de mulheres para fins de exploração sexual comercial, no Brasil (2002-2008)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Racismo, eugenia no pensamento conservador brasileiro: a proposta de povo em Renato Kehl

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Interlocuções entre Psicologia e Direitos Humanos: práticas interventoras

This intervention research was developed with adolescents of an establishment of care for children and adolescents considered at personal and social risk, in a city located in the state of São Paulo. The care practices found in the mentioned establishment are aimed at “prevention” of children and adolescents who could become offenders or future criminals, since they are selected from the poorest families in the outskirts of the city where the institution is located. Our psychological practice reported here, however, was conceived and put into practice from the discussion on Human Rights and Citizenship which aims to afirm what is considered deviation from the norm, opening spaces for the difference in relation to otherness and to the policy statement of these bodies in the urban setting within which they are inserted.

A criminologia crítica e o direito penal mínimo: avanços e retrocessos

This paper presents the emergence of knowledge-criminals criminal character of oppositional discourses to biologists and to the ideals of social defense, denouncing the criminal policies of discriminatory bias that still permeate the administrative practices of conflict. To this end, we examine the precepts of Critical Criminology revolutionary scenario that emerged in the 60s. His propositions denounced emphatically that social control was exercised by class interests and that the criminal policies were a reflection of capitalist domination extended to the criminal area. Accordingly, the present knowledge of such criminology, whose critical analysis culminated in the drafting of an alternative program for the management of the crisis of contemporary legalcriminal: the minimum criminal law and its proposed alternative sentences.

A problemática trazida pelos bancos de perfis genéticos criminais no Brasil

Pós-graduação em Direito - FCHS

Rivalidade entre Torcidas de Time de Futebol: violência nos Estádios

This research reveals an understanding that football fans have about the rivalry between fans. The fans believe that their rivalry on the one hand encourages teams, but when it passes the limit becomes violence and vandalism. The fans who attend the stadium are no longer made by families and are increasingly being criminals and delinquents who ruin the spectacle of football