Differentiation of black ballpoint pen writing by lab color mode

SUN Hua-qing, LIANG Lu-ning, LIN Lei-xiang, DONG Jun, ZOU Jin-xin

Forensic Science and Technology ›› 2012, Vol. 37 ›› Issue (4) : 23-25.
Orginal Article

Differentiation of black ballpoint pen writing by lab color mode

  • SUN Hua-qing, LIANG Lu-ning, LIN Lei-xiang, DONG Jun, ZOU Jin-xin
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Abstract

Objective To introduce a new method to differentiate black ballpoint pen writing. Methods Black ballpoint pen writing samples was scanned at 600dpi and saved as tiff files, and the images were processed with Lab color mode in Photoshop CS3.Results 61.67% samples can be differentiated by the Lab mode. Conclusion The handwritings of black ballpoint pens can be differentiated by this method.

Key words

Lab color mode / non-destructive testing / black ballpoint pen / photoshop

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SUN Hua-qing, LIANG Lu-ning, LIN Lei-xiang, DONG Jun, ZOU Jin-xin. Differentiation of black ballpoint pen writing by lab color mode. Forensic Science and Technology. 2012, 37(4): 23-25

References

[1] 张陆军,刘畅.中文版Photoshop CS3图像处理快学易通[M].北京:机械工业出版社,2008:23.
[2] Hammond, Derek L. Validation of LAB color mode as a nondestructive method to differentiate black ballpoint pen inks[J]. J Forensic Science, 2007, 52(4):967-973.
[3] Barbara Downer.Using LAB color mode in adobe photoshop to different between black ballpoint pen inks[J]. J Forensic Document Examination, 2010, 20: 71-73.

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