ABSTRACT
In order to improve the automation and reliability of inspection, it is necessary to use a certain number to express the complex striation tool marks to achieve digital inspection and identification. To achieve this purpose, this study adopts scissors, steel pliers, and wire-breaking pliers as shearing tools to make samples of shearing marks. The sample surface was marked by the software to get the profile curve which is perpendicular to the surface of marks. The fractal dimensions of the profile curve are calculated by applying general fractal dimension methods. The characteristic parameters of the dimension’s energy spectrum are calculated according to the fractal dimension spectrum. The energy spectrum of different
1 INTRODUCTION
On crime locations, various traces will be left behind by criminals using tools to destroy objects, the mark of a striation tool is one of them. It is usually composed of pliers and scissors and other tools. These tools will form a continuous striation seen visually or microscopically visible on every section in the process of cutting the objects. Traditionally, the tool marks are mostly inspected by visual comparison. It is to compare the striation tool marks collected from the crime scene with the test marks formed by suspected tools. The tool marks are determined based on striation comparison. This process is called “form inspection”. Practically, the surface topography of the striation tool marks is very complex and irregular, and also random and disorderly. Therefore, the surface topography of the striation tool marks cannot be described by digital description tools for a long time. The inspection of digital analysis cannot be used.
