using blur to affect perceived distance and...
TRANSCRIPT
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Using Blur to Affect Perceived Distance and Size
Authors:
Held, Robert T
Cooper, Emily a
O'Brien, James F
Banks, Martin SSome slides copied from the authors.
Presentation by Armin SamiiDiscussion with Dustin Shean
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![Page 4: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/4.jpg)
How do we sense depth? Blur
Naturally in our eyes More blurry = further
(from focal plane) Perspective, e.g.
Converging parallel lines
Occlusion
![Page 5: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/5.jpg)
How do we sense depth? Blur
Naturally in our eyes More blurry = further
(from focal plane)
![Page 6: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/6.jpg)
Basic Lens Optics: In focus
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Basic Lens Optics: Out of Focus
![Page 8: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/8.jpg)
How do we sense depth? Blur
Naturally in our eyes More blurry = further
(from focal plane) Perspective, e.g.
Converging parallel lines
Occlusion
![Page 9: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/9.jpg)
How do we sense depth?
Perspective, e.g.
Converging parallel lines
Occlusion
![Page 10: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/10.jpg)
What does perspective tell us?
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Image Creation
Knowing relative distance and desired focal distance,
how much to blur?
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Image Pereption
Knowing relative distance and blur diameter,
What is the focal distance?
![Page 13: Using Blur to Affect Perceived Distance and Sizevis.berkeley.edu/.../images/8/8a/Tilt_shift_effect.pdf · Using Blur to Affect Perceived Distance and Size Authors: Held, Robert T](https://reader036.vdocument.in/reader036/viewer/2022063017/5fd8de822076ef6e38429a95/html5/thumbnails/13.jpg)
FormulaBlur amount is inversely proportianal to
the relative distance
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Example: ++blur
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Examples that don't work Horizontal blur gradient
Vertical blur gradient
Linear blur / tiltshift optics
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Horizontal/Vertical Blur
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Normal Optics
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TiltShift Optics
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Simulating tilt&shift
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DISCUSSION TIME!
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Taking height into account
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SemiAutomated
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In Black & White