The evidential value of distorted and rectified digital images in [An article from: Forensic Science International
Book Details
Author(s)Y. Shor, A. Chaikovsky, T. Tsach
PublisherElsevier
ISBN / ASINB000P6NZJC
ISBN-13978B000P6NZJ6
MarketplaceFrance 🇫🇷
Description
This digital document is a journal article from Forensic Science International, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Abstract:
The procedure for forensic photography requires that the film plane be parallel to the taken image. Another procedure must be used when the print is located on reflecting surfaces such as vehicles, or faint marks on porous surfaces. Examination was made of the evidential value of footprint images received from the scene or taken deliberately at an angle out of proper perspective (i.e., the lens axis is not perpendicular to the target plane). An artificial target was prepared and photographed from several lens axis angles ranging from 10^o to 85^o to the perpendicular, and then rectified using the Adobe Photoshop Version 7.0^(R). It was found that at angles less than 40^o, the shape and location of all the individual characteristics were similar enough in comparison to the original image. In images taken at higher angles, the original image could not be adequately restored. The full potential of this image, therefore, could not be achieved after rectification. The results of this study show that the images of a footprint taken at an angle less than 40^o, preserve the evidential value of the unique characteristics.
Abstract:
The procedure for forensic photography requires that the film plane be parallel to the taken image. Another procedure must be used when the print is located on reflecting surfaces such as vehicles, or faint marks on porous surfaces. Examination was made of the evidential value of footprint images received from the scene or taken deliberately at an angle out of proper perspective (i.e., the lens axis is not perpendicular to the target plane). An artificial target was prepared and photographed from several lens axis angles ranging from 10^o to 85^o to the perpendicular, and then rectified using the Adobe Photoshop Version 7.0^(R). It was found that at angles less than 40^o, the shape and location of all the individual characteristics were similar enough in comparison to the original image. In images taken at higher angles, the original image could not be adequately restored. The full potential of this image, therefore, could not be achieved after rectification. The results of this study show that the images of a footprint taken at an angle less than 40^o, preserve the evidential value of the unique characteristics.
