W e have developed a comparison method for striation marks that are made with these tools. The comparison of toolmarks with a dedicated microscope is very time consuming and a preselection based on a database query of the information in the striation marks is useful. Since the real information is three dimensional, we have also developed a method to compare this kind of information based on structured light. Other databases that are currently under investigation are databases of earprints. These databases are needed to determine the statistical value of such evidence.
Image processing Image processing is used for many kinds of images in forensic science.
In practice this is used for fingerprints and many other trace evidence that is imaged in a digital form. Surveillance video images often have a poor quality. This is caused by eg. In the past we have investigated the different kinds of image restoration based on Wiener Restoration, Maximum Entropy and PDE's for still images. For artificial images this worked, however for real images it is rare that it works.