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16 篇 会议

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检索条件"任意字段=IEE Colloquium on Electronic Images and Image Processing in Security and Forensic Science"

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iee colloquium on 'electronic images and image processing in security and forensic science' (Digest No.087)

IEE Colloquium on 'Electronic Images and Image Processing in...

引用

iee colloquium on electronic images and image processing in security and forensic science

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colloquium on electronic images and image processing in security and forensic science

Colloquium on Electronic Images and Image Processing in Secu...

引用

colloquium on electronic images and image processing in security and forensic science

This colloquium incorporates eight papers that emphasize the use of modern techniques in electronics, photography and image processing as aids in crime prevention and detection. Topics considered include: integrated biometric databases, computer workstations for the transcription and analysis of carbon typewriter ribbons, the use of computer vision for security surveillance and movement control, polarimetric image processing, identification of automobile license plates, composite construction of face images, facial recognition for police purposes, and computer reconstruction of 2-D photographs.

关键词： image processing

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Computer vision for security surveillance and movement control

Computer vision for security surveillance and movement contr...

引用

colloquium on electronic images and image processing in security and forensic science

作者： Ali, A.T. Dagless, E.L. Univ of Bristol Bristol United Kingdom

The applications of images processing and computer vision in security and forensic science has been limited to image enhancement and image matching in a microscopic and laboratory techniques except for a few military application of image processing in the remote sensing area. security is the field in which computer vision is likely to play a major role in the prediction, prevention, detection and analysis of incidents. It is in this field in particular that there is a great need for dedicated artificial intelligence within computer vision capable of dealing with more complicated threats to security. This paper reports the application of several different parallel algorithms to detect and track moving objects in indoor and outdoor real-world scenes. The algorithms are coded in the OCCAM language and run in a transputer image processing system(TIPS).

关键词： Computer Vision

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Polarimetric image processing. An important new tool for forensic science

Polarimetric image processing. An important new tool for for...

引用

colloquium on electronic images and image processing in security and forensic science

作者： Kalawsky, Roy S.

This paper describes a powerful visual probing technique which has remained undiscovered until recently. The technique could be of benefit to forensic scientists. Whenever electromagnetic radiation is reflected from a surface, it becomes polarised to a degree, dependent upon surface structure, texture and angle of incidence. If the polarisation information from the reflected radiation is extracted from conventional intensity information by an imaging polarimeter it is possible to reveal detail about the surface that cannot be obtained by any other imaging technique. Hence, polarimetric images provide the means of observing objects and phenomena that are invisible to conventional imaging systems. An imaging polarimeter produces images representing the spatial variation in polarisation over the scene, which can be related to true texture, surface structure and material type. To provide an adequate perspective on the the capability of an imaging polarimeter, and how polarimetry could become an important technique for forensic science, the relevant theoretical basis for the processing of polarimetric images is presented.

关键词： image processing

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Number-plate matching for automatic vehicle identification

Number-plate matching for automatic vehicle identification

引用

colloquium on electronic images and image processing in security and forensic science

作者： Johnson, A.S. Bird, B.M. Univ of Bristol Bristol United Kingdom

This paper has outlined how number plate matching could be effectively used, possibly in conjunction with conventional technologies, in the prevention, detection, and solution of crime. The measures taken to minimise some problems in number plate matching and hence improve on the character recognition capability have also been discussed. Initial experiments in the implementation of these algorithms indicate that very high success rates are possible with this approach.

关键词： electronic Crime Countermeasures

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New approach to face composites construction superimposition of whole face images

New approach to face composites construction superimposition...

引用

colloquium on electronic images and image processing in security and forensic science

作者： Levi, A. Jungman, N. Ginton, A. Aperman, A. Israel Police Israel

The development of a computerized system for the construction of face composites, which covers witness interviewing, the composite construction, and a mugsearch using the resulting composite is reported. The system has three major stages: In the first, the witness chooses the photos most similar to the suspect from amongst a large number of album photos. In the second stage, the computer presents the witness with various average combinations of the photos which he chose, and s/he chooses the best representation of the suspect (either one of the original photos or one of the averages). In the third stage, the witness uses image editing techniques such as cutting and pasting and drawing in order to further improve the composite.

关键词： electronic Crime Countermeasures

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Integrated biometric database

Integrated biometric database

引用

colloquium on electronic images and image processing in security and forensic science

作者： Carter, John Nixon, Mark Univ of Southampton Southampton United Kingdom

R & D activities in the application of new feature extraction techniques applied for the analysis and hence classification of human faces are reported. The authors argue that their work in facial recognition has lead to the conclusion that there is a need for a large, well documented and high quality database of physical data on human beings. The effort in producing a high quality data set is significant, and must be properly resourced. However the additional effort in collecting additional types of information will be small once the initial work has been done. It is proposed that a fully integrated biometric data base be constructed and made freely available to all interested researchers.

关键词： image processing

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Computer reconstruction of 2-D photographs from alternative viewpoints

Computer reconstruction of 2-D photographs from alternative ...

引用

colloquium on electronic images and image processing in security and forensic science

作者： Duffy, N.D. Heriot-Watt Univ Edinburgh United Kingdom

The reconstruction of 'mug-shots' from various angles has obvious advantages where witnesses are attempting to identify a subject who may have been observed from a viewpoint other than that recorded on a frontal photograph. Alternatively, the ability to modify a frontal photograph in such a way that it allows reconciliation of the photograph and views of the subject as seen by witnesses from different viewpoints, has the potential to lead to a more accurate description of the subject being obtained. Both of these applications are facilitated by a computer graphics technique described in the paper, in which an image, held in computer memory, of a frontal facial photograph, is texture mapped onto the surface of an underlying 3-D skeletal model. To reconstruct the photograph to show the view from a different position, first the model, stored in the computer as a list of polygon edges and vertices, is rotated, translated and scaled by an appropriate amount. Then each pixel of the original frontal view of the subject is remapped with reference to the model, to derive the new view. In addition to allowing the reconstruction of photographs from various viewpoints, the technique permits alterations to be made to the appearance of reconstruction by blending in picture fragments such as mouth and eye sub-images and allows computer generated lighting effects to be added.

关键词： image processing

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Computer vision for security surveillance and movement control

Computer vision for security surveillance and movement contr...

引用

iee colloquium on electronic images and image processing in security and forensic science

作者： A.T. Ali E.L. Dagless Faculty of Engineering University of Bristol Bristol UK

The authors report the application of several different parallel algorithms to detect and track moving objects in indoor and outdoor real-world scenes. The algorithms are coded in the Occam language and run in a transputer image processing system (TIPS) which has been designed and built in the Faculty of Engineering at Bristol University.< >

关键词： Machine vision Monitoring image processing Parallel languages Parallel algorithms Tracking Microprocessors

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Facial recognition for police purposes using computer graphics and neural networks

Facial recognition for police purposes using computer graphi...

引用

colloquium on electronic images and image processing in security and forensic science

作者： Starkey, RB Aleksander, I. West Midlands Police

About 6 million people have a record on the Police National Computer, most of these will have been photographed and fingerprinted by the police at the time of their arrest. The fingerprints are kept nationally but the photographs are stored locally by each of the 43 forces in England and Wales. Generally the 35 mm photograph shows a front face view and a profile although one major force favours a three-quarter profile. There is an important need for international standards and for the photograph to carry a scaling metric. The photographs are used for record purposes and to make up witness albums. These provide about a one in ten chance of identifying a suspect if the enquiry ever gets that far. It's more usual for photographs to be stored away until the person is identified by other means and then used for briefing or circulations prior to arrest. These photobases form a valuable store of information that remains untapped. Pertinent research activities are reported.

关键词： electronic Crime Countermeasures

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