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Porthole: A spatial interface to provide scrolling, zooming-in, and zooming-out

Porthole: A spatial interface to provide scrolling, zooming-in, and zooming-out. A successful answer. A main screen to display part of the image. A sub window to display the entire image. Introduction. H ow do you see a L arge I mage within a L imited S creen?.

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Porthole: A spatial interface to provide scrolling, zooming-in, and zooming-out

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  1. Porthole: A spatial interface to provide scrolling, zooming-in, and zooming-out

  2. A successful answer A main screen to display part of the image A sub window to display the entire image Introduction How do you see a Large Image within a Limited Screen?

  3. A spatial interface to Scrolling, Zooming-in, and Zooming-out based on Porthole Metaphor Introduction Our answer came from a Porthole. In our system, More direct, intuitive, easier access.

  4. Visual Effects It describes while Walking around. Near-Position Front-Position Far-Position Viewpoint Terms Viewpoint: a point from which we see. View Scene View: an area within which we see. Scene: an image that is seen through the view. Porthole Metaphor

  5. Near-Position Front-Position Far-Position Porthole Metaphor The scene flows to the reverse.

  6. Near-Position Front-Position Far-Position Porthole Metaphor The view is contracted and the scene is narrowed.

  7. Near-Position Front-Position Far-Position Porthole Metaphor The view is expanded and the scene is widened.

  8. Zooming-out Scrolling Zooming-in Porthole Metaphor As if the scene flowed. As if the scene was narrowed. As if the scene was widened.

  9. Scrolling Zooming-out Zooming-in Near-Position Front-Position Far-Position The Basic Idea of A spatial interface to Scrolling, Zooming-in, and Zooming-out based on Porthole metaphor Porthole Metaphor

  10. Scrolling real space virtual space How to Realize

  11. Zooming-out Zooming-in real space virtual space How to Realize H/h = ACCd * (xr / xhome – 1.0) +1.0

  12. A screen projects images as if you have seen through a porthole. Screen size Height 27.5cm Width 35.6cm Web cameras track the user’s viewpoint. A map viewer A map viewer system

  13. A map viewer Framework of the system

  14. Initial Settings 200cm 200cm ACCv = 7.3 (200cm/27.5cm) ACCh = 5.6 (200cm/35.6cm) ACCd = 2.0 A map viewer Examples of Viewing 150cm Home plane 35.6cm 27.5cm Screen The vicinity of BOSTON

  15. Viewing of Scrolling 18cm 18cm A map viewer Examples of Viewing

  16. Viewing of Zooming-in & Zooming-out 100cm 220cm A map viewer Examples of Viewing

  17. Porthole Metaphor was introduced as three visual effects; Front-Position, Far-Position, and Near-Position. The similarity between these three visual effects and those of Scrolling, Zooming-in, and Zooming-out was focused on. A spatial interface to Scrolling, Zooming-in, and Zooming-out was proposed based on Porthole Metaphor. Conclusions Contributions

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