Jurrien Bijhold

Leiden University of Applied Sciences · Forensic ICT

The aim of this study was to find a method for the reconstruction of movements of people and cars using CCTV footage and a 3D model of the environment. A procedure is proposed, in which video streams are synchronized and displayed in a 3D model, by using virtual cameras. People and cars are represented by cylinders and boxes, which are moved in the...

1 Abstract The growing amount of security cameras increases the chance that there is important video footage available for the reconstruction of an incident. Using the right methods for analysis of large amounts of videos, it is possible to use this relevant information. In collaboration with the Netherlands Forensic Institute (NFI), research is do...

On the market several systems exist for collecting spent ammunition data for forensic investigation. These databases store images of cartridge cases and the marks on them. Image matching is used to create hit lists that show those cartridges in the database which have marks that are most similar to the marks of the cartridge case under investigatio...

On the market several systems exist for collecting spent ammunition for forensic investigation. These databases store images of cartridge cases and the marks on them. The research in this paper is focussed on the different methods of feature selection and pattern recognition that can be used for comparison. For automatic comparison of these images...

In this research an evaluation has been made of the different ways of contents based image retrieval of logos of drug tablets.

To reliably perform comparisons of facial images, it is important to position the head corresponding to the facial images available. Techniques using three or more landmark points on the face have been proposed for matching the face and camera positions to the available photographs. However, these methods can be cumbersome, and require the cooperat...

In criminal and civil cases, evidence is frequently needed to establish a nexus between a specific photograph and a specific camera. Defects in the charge-coupled device, noise introduced by the pixel arrays, file formats, and manufacturer watermarkings were examined as methods to establish the nexus.

Forensic Image Databases appear in a wide variety. The oldest computer database is with fingerprints. Other examples of databases are shoeprints, handwriting, cartridge cases, toolmarks drugs tablets and faces. In these databases searches are conducted on shape, color and other forensic features. There exist a wide variety of methods for searching...

We have reported the Charge Coupled Device (CCD) fingerprint method for identification of digital still cameras. The CCD fingerprint method utilizes the nonhomogeneous nature of dark currents in CCDs. In this study, we have measured CCD defects patterns of various digital still cameras including professional cameras and cheap ones with various reso...

The gait parameters of eleven subjects were evaluated to provide data for recognition purposes of subjects. Video images of these subjects were acquired in frontal, transversal, and sagittal (a plane parallel to the median of the body) view. The subjects walked by at their usual walking speed. The measured parameters were hip, knee and ankle joint...

This paper gives an overview of the various available image databases and ways of searching these databases on image contents. The developments in research groups of searching in image databases is evaluated and compared with the forensic databases that exist. Forensic image databases of fingerprints, faces, shoeprints, handwriting, cartridge cases...

From the court we were asked whether it is possible to determine if an image has been made with a specific digital camera. This question has to be answered in child pornography cases, where evidence is needed that a certain picture has been made with a specific camera. We have looked into different methods of examining the cameras to determine if a...

On the market several systems exist for collecting spent ammunition data for forensic investigations. These databases store images of cartridge cases and the marks on them. Image matching is used to create hit lists that show those cartridges in the database which have marks that are most similar to the marks of the cartridge case under investigati...

From the court we were asked whether it is possible to determine if an image has been made with a specific digital camera. This question has to be answered in child pornography cases, where evidence is needed that a certain picture has been made with a specific camera. We have looked into different methods of examining the cameras to determine if a...

We have developed and tested an algorithm that can compare striation marks that are acquired with a standard camera and sidelight as well as 3D- information acquired with structured light. With six different screwdrivers test marks have been made with an angle of 45 degrees to the surface. These striation marks are moulded with gray silicon casting...

In forensic laboratories, image processing and pattern recognition in image databases is given more attention for solving crime cases. In this paper a wide range of examples of forensic image processing and pattern recognition method is given.

At forensic laboratories, cases are submitted for forensic investigation of videotapes and recorders. The video investigation is often requested by the court for different types of crime, like robberies and homicides. For these investigations, most laboratories use a computer to digitize the images uncompressed in such that they try to minimize the...

In this research an evaluation has been made of the different ways of contents based image retrieval of logos of drug tablets. On a database of 432 illicitly produced tablets (mostly containing MDMA), we have compared different retrieval methods. Two of these methods were available from commercial packages, QBIC and Imatch, where the implementation...

In this paper, we present some results from a study in progress on methods for the measurement of the length of a robber in a surveillance video image. A calibration tool was constructed for the calibration of the camera. Standard procedures for computing the lens distortion, image projection parameters and the length of the robber have been implem...

On the market several systems exist for collecting spent ammunition for forensic investigation. These databases store images of cartridge cases and the marks on them. The research in this paper is focussed on the different methods of feature selection and pattern recognition that can be used for comparison. For automatic comparison of these images...

On the market several systems exist for collecting spent ammunition for forensic investigation. These databases store images of cartridge cases and the marks on them. The research in this paper is focussed on the different methods of feature selection and pattern recognition that can be used for computation For automatic comparison of these images...

In this paper, we describe the use and processing of image sequences for forensic investigations. For real-time digitization and storage of uncompressed movie files we use a computer equipped with a disk array system. The number of tape playbacks is minimized, while the use of still image/pause options of the VCR can be avoided completely. These mo...

In this work we investigated the forensic applicability of some state-of-the-art image restoration techniques for digitized video-images and photographs: classical Wiener filtering, constrained maximum entropy, and some variants of constrained minimum total variation. Basic concepts and experimental results are discussed. Because all methods appear...

In the last two years we have been testing FISH in the Netherlands police practice. FISH is a system for automatic recognition of handwriting originally developed by the BKA in Germany. Some of the most important classification algorithms that are used compute a feature vector from a digital binary image that shows handwriting without background pa...