Teaching:TUW - UE InfoVis WS 2009/10 - Gruppe G12 - Aufgabe 1 - Preattentive Processing: Difference between revisions
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|'''lighting direction'''<br>The lightning is normally constant for all objects in a certain scene so variations in the lightning of a single object can be used a preattentiv cue. | |'''lighting direction'''<br>The lightning is normally constant for all objects in a certain scene so variations in the lightning of a single object can be used a preattentiv cue. | ||
|[[Image:Tg_3d_light.gif|100px]] | |[[Image:Tg_3d_light.gif|100px]] | ||
|'''3D orientation'''<br> | |'''3D orientation'''<br>The orientation in a 3D space can also be used as a cue for preattentive processing. | ||
|[[Image:Tg_orient_3d.gif|100px]] | |[[Image:Tg_orient_3d.gif|100px]] | ||
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== Examples for preattentive processing == | == Examples for preattentive processing == | ||
[[Image: | [[Image:Bild_302.png|thumb|200px|left]] | ||
<div style="clear:both; height:0px;"> </div> | |||
Detecting an red object within similar shaped blue ones [Chipman, 1996]<br> | |||
Since color is a very good preattentive feature the red circle can be found very easily. | |||
[[Image:Bild_303.png|thumb|200px|left]] | |||
<div style="clear:both; height:0px;"> </div> | |||
Detecting the circle preattentively. [Chipman, 1996]<br> | |||
This is more challenging because the similar color is a stronger feature than the deviant shape but a preattentive identification is still possible. | |||
[[Image: | [[Image:Terget_detection.png|thumb|200px|left|(a)]] | ||
[[Image:Terget_detection1.png|thumb|200px|left|(b)]] | |||
<div style="clear:both; height:0px;"> </div> | |||
Examples of two target detection tasks: (a) target can be detected preattentively because it possesses the feature “filled”; (b) target cannot be detected preattentively because it has no visual feature that is unique from its distractors. [Healey et al., 1996] | |||
[[Image:Hue_shape_P.gif|thumb|200px|left|(a)]] | |||
[[Image:Shape_hue_P.gif|thumb|200px|left|(b)]] | |||
<div style="clear:both; height:0px;"> </div> | |||
Region segregation by form and hue: (a) hue boundary is identified preattentively, even though form varies randomly in the two regions; (b) random hue variations interfere with the identification of a region boundary based on form. [Healey et al., 1996] | |||
==Conclusion== | ==Conclusion== | ||
Any visual processing of that item prior to the act of selection can be called | Any visual processing of that item prior to the act of selection can be called preattentive. [Wolfe, Treisma, 2003] | ||
Preattentive processing can help to rapidly draw the focus of attention to a target with a unique visual feature (i.e., little or no searching is required in the preattentive case). [Healey, 2005] | Preattentive processing can help to rapidly draw the focus of attention to a target with a unique visual feature (i.e., little or no searching is required in the preattentive case). [Healey, 2005] |
Latest revision as of 21:57, 10 November 2009
Preattentive processing[edit]
Preattentive features[edit]
Compiled list from [Healey, 2005], [Chipman, 1996]
Examples for preattentive processing[edit]
Detecting an red object within similar shaped blue ones [Chipman, 1996]
Since color is a very good preattentive feature the red circle can be found very easily.
Detecting the circle preattentively. [Chipman, 1996]
This is more challenging because the similar color is a stronger feature than the deviant shape but a preattentive identification is still possible.
Examples of two target detection tasks: (a) target can be detected preattentively because it possesses the feature “filled”; (b) target cannot be detected preattentively because it has no visual feature that is unique from its distractors. [Healey et al., 1996]
Region segregation by form and hue: (a) hue boundary is identified preattentively, even though form varies randomly in the two regions; (b) random hue variations interfere with the identification of a region boundary based on form. [Healey et al., 1996]
Conclusion[edit]
Any visual processing of that item prior to the act of selection can be called preattentive. [Wolfe, Treisma, 2003]
Preattentive processing can help to rapidly draw the focus of attention to a target with a unique visual feature (i.e., little or no searching is required in the preattentive case). [Healey, 2005]
References[edit]
- [Kosara et al., 2002] Robert Kosara, Silvia Miksch, Helwig Hauser. Focus+Context Taken Literally IEEE Computer Graphics & Applications (CG&A), Special Issue on Information Visualization, 22(1), pages 22-29. Created at: January/February, 2002. http://www.kosara.net/papers/Kosara_CGA_2002.pdf .
- [Healey et al., 1996] Healey, C. G., Booth, K. S., and Enns, J. T.. High-Speed Visual Estimation Using Preattentive Processing. ACM Transactions on Human Computer Interaction 3(2), pages 107-135, Created at: 1996. http://www.csc.ncsu.edu/faculty/healey/download/tochi.96.pdf .
- [Wolfe, Treisma, 2003] Jeremy M Wolfe, Anne Treisma. What shall we do with the preattentive processing stage: Use it or lose it?, Todd S Horowitz poster presented at the Third Annual Meeting of the Vision Sciences Society. Sarasota. Created at: May, 2003. http://search.bwh.harvard.edu/links/talks/VSS03-JMW.pdf .
- [Healey, 2005] Christopher G. Healey. Perception in Visualization. Department of Computer Science, North Carolina State University. Created at: May, 2005. http://www.csc.ncsu.edu/faculty/healey/PP/index.html#Tri_Cog_Psych:80 .
- [Chipman, 1996] Gene Chipman. Review of High Speed Visual Estimation Using Preattantive Processing (Healy, Booth and Enns). Created at: 1996, Retrieved at: October 24, 2005. http://www.cs.umd.edu/class/spring2002/cmsc838f/preattentive.ppt#267 .