Quantitative comparison of striated toolmarks

Baiker, Martin; Keereweer, Isaac; Pieterman, René; Vermeij, Erwin; Weerd, Jaap van der; Zoon, Peter

doi:10.1016/j.forsciint.2014.06.038

Cited by 33 publications

(56 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the conducted experiments, the tool‐marks were made by 10 previously unused screwdrivers (with a blade width of 6 mm), 10 previously unused cutting pliers (with a blade length of 25 mm), and 8 previously unused bolt clippers (with a blade length of 30 mm), as shown in Figure S1. In other experiments , wax was selected as substrate material. However, here, lead sheet and lead wire (with a diameter of 5 mm) were selected as substrate materials since lead represents a metallic material with good malleability and low hardness and can duplicate the features on the part affected by the tools.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, in this work, dimensionality reduction was applied to the extracted LBP features via uniform pattern. Utilizing the uniform pattern, the number of binary patterns decreased from 2 8 = 256 (eight neighborhoods) to (8 9 (8-1) + 2) = 58. To achieve data integrity in the experiments, the pixels of more than two loop hoppings were uniformly categorized as the 59th pattern.…”

Section: Methodsmentioning

confidence: 99%

“…Baiker et al. proposed an objective automatic comparison method of striation tool‐marks, using multiscale striation mark registration and an overall cross‐correlation value as a tool‐mark similarity matrix for comparison. This method could identify the striation marks formed by a screwdriver with an angle error of 30°.…”

mentioning

confidence: 99%

“…Chumbley et al (7) optimized the mark correlation comparison algorithm proposed by Faden et al (6) and divided the correlation calculations into two steps, that is, optimization and verification, thus improving the effectiveness of mark inspection. Baiker et al (8) proposed an objective automatic comparison method of striation tool-marks, using multiscale striation mark registration and an overall cross-correlation value as a tool-mark similarity matrix for comparison. This method could identify the striation marks formed by a screwdriver with an angle error of 30°.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Quantitative Statistics and Identification of Tool‐Marks

Yang

et al. 2019

Journal of Forensic Sciences

View full text Add to dashboard Cite

This study was designed to establish a feature identification method of tool‐mark 2D data. A uniform local binary pattern histogram operator was developed to extract the tool‐mark features, and the random forest algorithm was adopted to identify these. The presented method was used to conduct five groups of experiments with a 2D dataset of known matched and nonmatched tool‐marks made by bolt clippers, cutting pliers, and screwdrivers. The experimental results show that the proposed method achieved a high rate of identification of the tool‐mark samples generated under identical conditions. The proposed method effectively overcomes the disadvantage of unstable illumination of 2D tool‐mark image data and avoids the difficulty in mark inspection caused by manually preset parameters in the existing methods, thus reducing the uncertainty of inspected results.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Quantitative Statistics and Identification of Tool‐Marks

Yang

et al. 2019

Journal of Forensic Sciences

View full text Add to dashboard Cite

show abstract

“…In other words, it is vital to analyze the bone cut and saw marks to determine whether the saw-marks in the bones correspond to the weapon found for purposes of later evidentiary and testimonial admissibility. Here, several tests for comparison of different types of saws are needed [9]. Most important, a specialized device such as a handheld device is particularly needed to analyze the saw-marks in the bone via quantitative measurements for a pathological determination.…”

Section: Casementioning

confidence: 99%

Real Time Examination of Saw Marks on Bone Produced by Three Common Types of Saws: A Digital and Quantitative Method

Wang¹

2016

FRCIJ

View full text Add to dashboard Cite

Saw marks are common in cases and autopsies associated with dismemberment and/or mutilation. However, due to difficulties in using current methods to determine types of saws based upon their respective tool marks on/in bones, this topic has not been well researched or published. These difficulties become even greater if determinations are court challenged due to a lack of substantiating quantitative measurements taken during an autopsy or even at the scene in a documented real time manner. Using a quasi-experimental design, the author used three types of saws (a circular saw, a regular saw, and a handsaw) to cut a piece of dry bovine (cow) bone and measured their tool marks separately using a hand-held digital device. The preliminary results indicate the ability to differentiate the three types of saw marks based upon eight quantifiable criteria. The findings from this study suggest real time quantitative measurements may be available for saw marks during both the processing of an autopsy as well as in the field.

show abstract

Sharp force trauma with two katana swords: identifying the murder weapon by comparing tool marks on the skull bone

2020

View full text Add to dashboard Cite

This paper describes the variety of information that a tool mark analysis on human tissue can provide based on a case of multiple sharp violence. The perpetrator attacked the victim with a sharp-edged weapon against the head, leaving several deep wounds on the back of the skull bone. Three of those marks on the skull bone could be used for a forensic tool mark examination. Silicone casts of the marks were compared by light microscopy with casts of test marks of Japanese katana swords found at the crime scene. One of the swords could be identified as the one responsible for the marks. In addition, the marks and the test marks were scanned in 3D and examined in a visual on-screen comparison confirming the results from the light microscopic examination. Furthermore, a mathematical approach in which the signatures of the marks from the skull bone and the test marks from the sword were compared by cross correlation confirms those findings. In addition, the aforementioned results were used to determine the orientation of the sword in relation to the cranial bone at the time of the respective impact.

show abstract

Quantitative comparison of striated toolmarks

Cited by 33 publications

References 17 publications

Quantitative Statistics and Identification of Tool‐Marks

Quantitative Statistics and Identification of Tool‐Marks

Real Time Examination of Saw Marks on Bone Produced by Three Common Types of Saws: A Digital and Quantitative Method

Sharp force trauma with two katana swords: identifying the murder weapon by comparing tool marks on the skull bone

Contact Info

Product

Resources

About