[infra red photography in bruises after it disappear to the naked eye]

by

Acknowledgement

I would take this opportunity to thank my research supervisor, family and friends for their support and guidance without which this research would not have been possible (Atwal, 1998,, 215).

DECLARATION

I, [type your full first names and surname here], declare that the contents of this dissertation/thesis represent my own unaided work, and that the dissertation/thesis has not previously been submitted for academic examination towards any qualification. Furthermore, it represents my own opinions and not necessarily those of the University (Atwal, 1998,, 215).

Signed __________________ Date _________________

Abstract

The purpose of the study was to determine whether Infrared imaging could play a role in the detection of previous blunt force injury after resolution of skin changes were no longer visible to the human eye. Investigations were performed using an adapted digital camera and the same standard Nikon camera body to photograph the bruises of ten volunteer adult subjects. The same lens was fitted to each camera body and each bruise was photographed until it was no longer possible to identify it with the naked eye. The results of photographing subjects over 6 months demonstrated that the median time the bruises persisted in both groups was approximately between 18 and 19 days. There was no statistically significant difference between groups of bruises photographed with both the infrared digital camera that had been adapted to capture only infrared light, and with the standard camera which had the same lens fitted to it. The two groups of photographs of bruises imaged at the same time with the two cameras were not significantly different with regard to what skin changes could be detected. The use of the near infrared spectrum, with wavelengths that are longer than the human eye can detect, did not reveal significant evidence of bruising after it had faded from view to both the human eye and to a standard camera.

Table of Content

INTRODUCTION4

LITERATURE REVIEW5

RESEARCH AND METHODS15

AN ALTERNATIVE INFRARED: FILTERING THE LIGHT SOURCE19

EXPERIMENTATION WITH ULTRAVIOLET PHOTOGRAPHY20

EXPERIMENTATION WITH INFRARED PHOTOGRAPHY21

CONCLUSIONS22

REFERENCES25

Infra Red Photography in Bruises after it Disappear to the Naked Eye

Introduction

The colors that are visible to the eye represent only a small portion of the light spectrum, also known as the electromagnetic spectrum. Visible light, or white light, is a combination of all the visible colors. A beam of white light can be separated into the visible spectrum using a prism. The band of colors range from violet to blue, blue-green, green, yellow, orange, red and deep red. Each color represents a different wavelength of light. These wavelengths increase in the direction from blue to red along the length of the spectrum. The visible region of the light spectrum ranges from 400 to 700 nanometers (nm) in wavelength.

The areas extending in either direction beyond the visible spectrum are the invisible regions of light. Below violet from 200 to 400 nm is the ultraviolet region. Although we cannot see this light, it is reactive with photographic materials. Therefore, it is possible to produce images that may only ...