Boots – shoes – and leggings
Patent
1994-12-29
1997-08-19
Weinhardt, Robert A.
Boots, shoes, and leggings
382108, 382278, G06F 1700
Patent
active
056594895
ABSTRACT:
A method for obtaining a signature from a fired bullet is obtained by mounting the bullet to turn substantially about a longitudinal axis of the bullet, illuminating a surface of the bullet, obtaining and storing a frame image at a given position of the surface portion using microscope optics, the frame image having a transverse extent substantially transverse to the longitudinal axis, advancing the frame image position by an amount less than a transverse extent of the frame image, repeating the last two steps a plurality of times to obtain a plurality of overlapping frame images, combining the frame images to form a continuous composite image having a transverse extent much greater than the transverse extent of the frame images, and computing a signature of the composite image along a line extending in the transverse extent of the composite image. The points of the signature are determined from image data along a direction of striations in the composite image which is at an angle with respect to the transverse line and the longitudinal axis.
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Arndt et al., "Bullet Signature Identification Using Time Domain Computer Techniques", Proceedings of Int. Carnahan Conf. pp. 145-151 1983.
Unitech Inc., "Ballistic Signature Identification System Study", Report #NASA-CR-147820 Contract #NAS9-14708 May 1976 40 pages.
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Forensic Technology (Wai) Inc.
Weinhardt Robert A.
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