Pen mark feature computer quantification and comparison assisted analysis system

Abstract

The invention belongs to the technical field of document examination and identification in the criminal science technology, and in particular relates to a pen mark feature computer quantification and comparison assisted analysis system. The invention provides the pen mark feature computer quantification and comparison assisted analysis system with high pen mark comparison efficiency and accuracy.The system comprises an image import module, an image processing module, a quantification feature statistical analysis module and a measurement and comparison module; the image import module is used for reading examined material image pixels by adopting a Scanline function; the image processing module is used for binarization, contour extraction, reverse color taking, brightness adjustment and contrast processing of an imported examined material image; the quantification feature statistical analysis module is used for counting area and perimeter of pen marks in the processed examined materialimage, and performing counter superposition comparison display on the pen marks in the examined material image and the pen marks in a sample image; and the measurement and comparison module is used for comparing lengths, widths and angles of the pen mark features on the examined material and the sample, and calculating each difference.

Description

technical field [0001] The invention belongs to the technical field of document inspection and identification in criminal science and technology, and in particular relates to an auxiliary analysis system for computer quantitative comparison of features of pen marks. Background technique [0002] The pen mark feature is the subtle sign that the personal writing movement acts on the nib and is reflected in the stroke. The particularity of the microstructure of each pen and the particularity of each person's writing habits together constitute the unique pen mark feature system written by the same person with the same pen. Therefore, the species identification of writing instruments and identification of personal identity can be carried out by using the characteristics of pen marks. [0003] At present, the understanding of the individual characteristics of pen marks mainly depends on the expertise and experience of handwriting experts for identification and judgment. Sometimes...

AI Technical Summary

Problems solved by technology

[0003] At present, the understanding of individual characteristics of handwriting mainly depends on the expertise and experience of handwriting experts to identify and judge, sometimes due to the lack of sufficient and convincing objective evidence , it is difficult to make an identification conclusion, or when there are differences in identification conclusions, there is no objective standard and solid basis to unify the understanding, the efficiency and accuracy of pen mark comparison are low, which causes difficulties in investigation and trial work, and also makes the pen mark inspection technology difficult. Development and widespread application are limited

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