Title
Perceptual evaluation of color transformed multispectral imagery
Author
Toet, A.
de Jong, M.J.
Hogervorst, M.A.
Hooge, I.T.C.
Publication year
2014
Abstract
Color remapping can give multispectral imagery a realistic appearance. We assessed the practical value of this technique in two observer experiments using monochrome intensified (II) and long-wave infrared (IR) imagery, and color daylight (REF) and fused multispectral (CF) imagery. First, we investigated the amount of detail observers perceive in a short timespan. REF and CF imagery yielded the highest precision and recall measures, while II and IR imagery yielded significantly lower values. This suggests that observers have more difficulty in extracting information from monochrome than from color imagery. Next, we measured eye fixations during free image exploration. Although the overall fixation behavior was similar across image modalities, the order in which certain details were fixated varied. Persons and vehicles were typically fixated first in REF, CF, and IR imagery, while they were fixated later in II imagery. In some cases, color remapping II imagery and fusion with IR imagery restored the fixation order of these image details. We conclude that color remapping can yield enhanced scene perception compared to conventional monochrome nighttime imagery, and may be deployed to tune multispectral image representations such that the resulting fixation behavior resembles the fixation behavior corresponding to daylight color imagery.
Subject
Human Performances
PCS - Perceptual and Cognitive Systems
ELSS - Earth, Life and Social Sciences
Vision
Defence, Safety and Security
Image fusion
Color fusion
False color
Color mapping
Night vision
Scene gist
Gaze behavior
To reference this document use:
http://resolver.tudelft.nl/uuid:7fef3f91-c52e-4762-aaa8-e9619b7f4e45
DOI
https://doi.org/10.1117/1.oe.53.4.043101
TNO identifier
493954
Source
Optical Engineering, 53 (4)
Article number
043101
Document type
article