Share Email Print
cover

Optical Engineering

Evaluation of intensified image enhancement through conspicuity and triangle orientation discrimination measures
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

For many military operations, situational awareness is of great importance. During night conditions, this situational awareness can be improved using both analog and digital image-intensified cameras. The quality of image intensifiers is a topic of interest. One of the differences between a digital and analog system is noise behavior. For digital image intensifiers, the noise behavior is not as good as for analog image intensifiers, but it can be improved using noise-reduction techniques. In this paper, the improvement using temporal noise reduction and local adaptive contrast enhancement is shown and quantitatively evaluated by subjective measurement of the conspicuity and triangle orientation discrimination (TOD). The results of the conspicuity and TOD experiments are consistent with each other. The highest improvement is found for a low-clutter environment; for medium- and high-clutter environments, the improvement is less. This can be explained by the fact that image enhancement increases contrast of all image details, irrespective of whether they are targets or clutter. For low-clutter image enhancement, target conspicuity and target detection improvement will be largest, since there are not many distracting elements.

Paper Details

Date Published: 4 December 2012
PDF: 11 pages
Opt. Eng. 52(4) 041105 doi: 10.1117/1.OE.52.4.041105
Published in: Optical Engineering Volume 52, Issue 4
Show Author Affiliations
Judith Dijk, TNO Defence, Security and Safety (Netherlands)
Adam W. M van Eekeren, TNO Defence, Security and Safety (Netherlands)
Alexander Toet, TNO Defence, Security and Safety (Netherlands)
Richard J. den Hollander, TNO Defence, Security and Safety (Netherlands)
Klamer Schutte, TNO Defence, Security and Safety (Netherlands)
Ad W. P. van Heijningen, TNO Defence, Security and Safety (Netherlands)
Piet Bijl, TNO Defence, Security and Safety (Netherlands)


© SPIE. Terms of Use
Back to Top