Target detection in color imagery: on the path to a color target acquisition model

2004 ◽  
Author(s):  
Keith A. Krapels ◽  
Tarik Jones ◽  
Ronald G. Driggers ◽  
Brian Teaney
Keyword(s):  
Target Detection ◽  
Target Acquisition ◽  
Color Target ◽  
Color Imagery

The Effects of Certain Gimbal Orders on Target Acquisition and Workload

1975 ◽  
Vol 17 (6) ◽  
pp. 571-576 ◽  
Author(s):  
Dennis L. Price
Keyword(s):  
Target Detection ◽  
Target Acquisition ◽  
Identification Performance ◽  
Imaging Sensors ◽  
Operator Workload

If air-to-ground imaging sensors are mounted to aircraft by different gimbal order systems, the displayed scene will rotate differently, even though the flight paths are identical. Eighteen experienced pilots were tested to investigate the effects of three gimbal orders (roll-pitch, yaw-pitch, and pitch-yaw) on target detection, recognition, and identification performance, and also on operator workload. The pitch-yaw gimbal order was associated with the greatest range-to-target scores and the lightest workloads.

Producing a color target acquisition metric

2013 ◽  
Author(s):  
Assaf Asbag ◽  
Racheli Hayun ◽  
Neta Gadot ◽  
Ricky Shama ◽  
Stanley R. Rotman
Keyword(s):  
Target Acquisition ◽  
Color Target

Target Acquisition in Realistic Terrain

1977 ◽  
Vol 21 (3) ◽  
pp. 249-253 ◽  
Author(s):  
Lawrence A. Scanlan
Keyword(s):  
Mathematical Models ◽  
Target Detection ◽  
Optical Sensor ◽  
Component Model ◽  
Target Acquisition ◽  
Target Search ◽  
Average Luminance ◽  
Two Component ◽  
Uniform Background ◽  
Detection And Recognition

A number of mathematical models of target acquisition have been developed to predict the performance of electro-optical sensor systems. None of these models, however, adequately treat the influence of the background scene on operator tactical target detection and recognition. Most assume a uniform background of some average luminance: a situation that is unlikely to occur in any realistic mission. The failure to include the influence of backgrounds of varying complexity may result in erroneous predictions of performance that are highly optimistic. The reported research was directed toward the issues of background scene complexity. The data are interpreted as evidence for a two-component model of target search and detection.

Target detection threshold in noisy color imagery

2001 ◽  
Author(s):  
Ronald G. Driggers ◽  
Keith A. Krapels ◽  
Richard H. Vollmerhausen ◽  
Penny R. Warren ◽  
Dean A. Scribner ◽  
...  
Keyword(s):  
Target Detection ◽  
Detection Threshold ◽  
Color Imagery

Accommodation and the Acquisition of Distant Targets by Observers with Superior Vision

1983 ◽  
Vol 27 (3) ◽  
pp. 259-263
Author(s):  
Kirk Moffitt
Keyword(s):  
Target Detection ◽  
Target Acquisition ◽  
Distance Information ◽  
Acquisition Performance ◽  
On Demand ◽  
Series Of Experiments ◽  
Visual Accommodation ◽  
Small Targets ◽  
Dark Focus ◽  
Military Pilots

The visual accommodation ability of young observers with healthy eyeballs has typically been underestimated. A series of experiments and demonstrations was conducted to study how a pilot might use his eyes to optimize target acquisition performance in different visual environments. Observers with uncorrected far acuities of 20/20 or better were selected for participation. Target acquisition tasks were performed while accommodation was simultaneously monitored with an infrared optometer. The target was always small and located at optical infinity. The average dark focus was more distant than is typically reported and tended to shift outwards with experience on the optometer. When observers were provided with distance information, half were apparently able to “look through” near peripheral texture in order to optimize accommodation accuracy and target detection performance. Although most observers were capable of using imagery to shift their accommodation outwards in the dark, this did not predict the ability to “look through” near texture. In a subsequent demonstration, two observers were able to focus and defocus small targets on demand. Implications for military pilots, many of whom have superior vision, are discussed.

Background Influence on Visual Accommodation: Implications for Target Acquisition

1981 ◽  
Vol 25 (1) ◽  
pp. 277-281 ◽  
Author(s):  
Russell A. Benel ◽  
Denise C. R. Benel
Keyword(s):  
Target Detection ◽  
High Contrast ◽  
Target Acquisition ◽  
Visual Accommodation

The accommodation of two groups of six observers each of whom viewed high-contrast checkerboard targets presented at six distances (0.9, 1.8, 3.7, 7.3, 16.6 and 29.3m) against either of two backgrounds (highly textured or textureless) was measured with a laser optometer. Significant differences existed between the accommodative responses at each distance due to backgrounds. Implications for size-distances perception and target detection are discussed.

Selective Attention and Error Processing in an Illusory Conjunction Task

2005 ◽  
Vol 19 (3) ◽  
pp. 216-231 ◽  
Author(s):  
Albertus A. Wijers ◽  
Maarten A.S. Boksem
Keyword(s):  
Target Detection ◽  
Event Related Potentials ◽  
Illusory Conjunction ◽  
Conjunction Error ◽  
Error Related Negativity ◽  
Display Element ◽  
Related Potentials ◽  
Feature Error ◽  
High Level ◽  
Correct Target

Abstract. We recorded event-related potentials in an illusory conjunction task, in which subjects were cued on each trial to search for a particular colored letter in a subsequently presented test array, consisting of three different letters in three different colors. In a proportion of trials the target letter was present and in other trials none of the relevant features were present. In still other trials one of the features (color or letter identity) were present or both features were present but not combined in the same display element. When relevant features were present this resulted in an early posterior selection negativity (SN) and a frontal selection positivity (FSP). When a target was presented, this resulted in a FSP that was enhanced after 250 ms as compared to when both relevant features were present but not combined in the same display element. This suggests that this effect reflects an extra process of attending to both features bound to the same object. There were no differences between the ERPs in feature error and conjunction error trials, contrary to the idea that these two types of errors are due to different (perceptual and attentional) mechanisms. The P300 in conjunction error trials was much reduced relative to the P300 in correct target detection trials. A similar, error-related negativity-like component was visible in the response-locked averages in correct target detection trials, in feature error trials, and in conjunction error trials. Dipole modeling of this component resulted in a source in a deep medial-frontal location. These results suggested that this type of task induces a high level of response conflict, in which decision-related processes may play a major role.

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