CA2361341A1 - Use of detail-in-context presentation on stereoscopically paired images - Google Patents
Use of detail-in-context presentation on stereoscopically paired images Download PDFInfo
- Publication number
- CA2361341A1 CA2361341A1 CA002361341A CA2361341A CA2361341A1 CA 2361341 A1 CA2361341 A1 CA 2361341A1 CA 002361341 A CA002361341 A CA 002361341A CA 2361341 A CA2361341 A CA 2361341A CA 2361341 A1 CA2361341 A1 CA 2361341A1
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- lenses
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F3/04815—Interaction with a metaphor-based environment or interaction object displayed as three-dimensional, e.g. changing the user viewpoint with respect to the environment or object
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C9/00—Stereo-photographic or similar processes
- G03C9/08—Producing three-dimensional images
Description
USE OF DETAIL-IN-CONTEXT PRESENTATION ON STEREOSCOPICALLY
PAIRED IMAGES
Introduction Detail-in-context presentations of data using techniques such as pliable surfaces as described in publication and incorporated herein by reference, are useful in presenting large amounts of information on limited-size display surfaces. Detail-in-context views allow magnification of a particular region of interest (the "focal region") in a data presentation while preserving visibility of the surrounding information. The present invention addresses the use of detail-in-context presentation on stereoscopically paired images, and the use of stereoscopic rendering techniques to display pliable surfaces in 3D.
Description of the Invention Detail-in-Context data representation are characterized by magnification of areas of an image where detail is desired, in combination with compression of a restricted range of areas of the remaining information (the "context"), the result typically giving the appearance of a lens having been applied to the display surface. Such a presentation can be generated using, for example, a perspective projection technique such as that described in reference 1. Using this technique, points are displaced in 3D and a perspective projection is used to display the points on a 2D display. When a lens is applied to a continuous surface the resulting transformation gives the impression of being 3D because the transformations are consistent with a 3D lens having "stretched" the surface. Shading the area transformed by the lens (the "Tensed" area) fizrther reinforces this 3D effect.
These two monocular perceptual cues are strong and together give the illusion of depth on a 2D display. The present invention describes a system and method which uses stereoscopic rendering techniques to create the illusion that the Tensed area is protruding out of the screen toward the user.
Rendering pliable display technology (PDT) lenses stereoscopically A 3D object is rendered stereoscopically by rendering the object twice, once from a right-eye view and once from a left-eye view. When no lens is applied to an image, the right and left views are the same. When a lens is applied, the displacements are calculated once and stored in 3-dimensional coordinates. These newly displaced points are then rendered twice using two separate perspective viewing volumes. When viewed without proper stereo hardware, the area within the lens appears doubled. The distance between a point rendered by the right viewing volume and the same point rendered with the left viewing volume is called "parallax". The greater the parallax, the more an object appears to be off the plane of the display screen. The height of a data point and the horizontal distance between the two viewing volumes (i.e. the eye separation), controls the amount of parallax. Too much parallax is uncomfortable to view as described in reference 2.
The maximum amount of parallax on a lens will be in its focal region.
Typically, an image being viewed with a PDT lens has a finite resolution. With this information the system calculates the height of a lens when it has magnified the image to the limit of its resolution. Using this maximum height the system can adjust the eye separation such that the maximum parallax will not be uncomfortable. In the context of images with infinite resolution such as vector data, the maximum height of the lens is chosen based on some maximum amount of compression allowed in the shoulder for a lens of some average size. When considering the maximum parallax the system may also need to take into account the additional parallax on the image if it is itself stereoscopic, and decrease the eye separation accordingly. Because viewing discomfort varies from user to user, it is necessary to also provide manual configuration of eye separation.
Applying PDT lenses to stereoscopically paired images PDT lenses are applied to stereoscopically paired images by displacing the points on both images and rendering the left and right image consecutively using perspective projection.
We can save time by calculating the displacements only once on a finitely subdivided mesh, and consecutively texture-mapping the right and left image on the mesh.
Using proper stereo viewing hardware, the images will have their original stereo effect where they are not distorted by a lens. In the lensed areas, the stereo effect will be intensified in the focal region and generally reduced in the shoulder. Only the areas of the shoulder that compress the data horizontally will decrease the parallax. On all areas of the shoulder the perception of depth will be affected by the steepness of the shoulder.
A simpler approach would be to create red/blue anaglyphs of the paired images and render that image just as we would a mono image. In this case, no special hardware is necessary beyond red/blue glasses.
Viewing stereoscopically paired images with stereoscopic lenses There is incongruence in viewing stereoscopically paired image with non-stereo lenses.
The lack of depth in the lenses can be disturbing because the user is accustomed to looking for depth in the image and there are strong monocular cues that the lens is in fact 3-dimensional. We can combine the stereo viewing techniques described above to view stereoscopically paired images with stereoscopically rendered lenses. The effect will be to lift the zero parallax setting (ZPS) of the image by the height of the lens in the focal region and shoulder. That is, if an area of the image appeared to be sunk into the screen it will appear to be sunk in to the lens. Similarly, if an area of the image appeared to in front of the screen, it will appear to be higher than the lens. Note that the eye separation used for the stereo lenses will not affect the parallax of the image. It strictly influences the depth perception of the lenses. Again, it is necessary to provide manual configuration of eye separation to vary the depth perception of the lenses depending on the application.
User interface techniques for stereoscopic lenses A user interface technique for non-stereo PDT lenses has been covered in ~ a previous patent application. We extend this technique to stereo lenses by rendering the controls in stereo where it is desirable to do so. Because the focal region of a stereoscopic lens appears to be in front of the screen, we need to render the focal region user interface control in stereo such that it appears at the same height as the focal region.
We do this by adding a height to the control and rendering it twice, once with a left-eye viewing
PAIRED IMAGES
Introduction Detail-in-context presentations of data using techniques such as pliable surfaces as described in publication and incorporated herein by reference, are useful in presenting large amounts of information on limited-size display surfaces. Detail-in-context views allow magnification of a particular region of interest (the "focal region") in a data presentation while preserving visibility of the surrounding information. The present invention addresses the use of detail-in-context presentation on stereoscopically paired images, and the use of stereoscopic rendering techniques to display pliable surfaces in 3D.
Description of the Invention Detail-in-Context data representation are characterized by magnification of areas of an image where detail is desired, in combination with compression of a restricted range of areas of the remaining information (the "context"), the result typically giving the appearance of a lens having been applied to the display surface. Such a presentation can be generated using, for example, a perspective projection technique such as that described in reference 1. Using this technique, points are displaced in 3D and a perspective projection is used to display the points on a 2D display. When a lens is applied to a continuous surface the resulting transformation gives the impression of being 3D because the transformations are consistent with a 3D lens having "stretched" the surface. Shading the area transformed by the lens (the "Tensed" area) fizrther reinforces this 3D effect.
These two monocular perceptual cues are strong and together give the illusion of depth on a 2D display. The present invention describes a system and method which uses stereoscopic rendering techniques to create the illusion that the Tensed area is protruding out of the screen toward the user.
Rendering pliable display technology (PDT) lenses stereoscopically A 3D object is rendered stereoscopically by rendering the object twice, once from a right-eye view and once from a left-eye view. When no lens is applied to an image, the right and left views are the same. When a lens is applied, the displacements are calculated once and stored in 3-dimensional coordinates. These newly displaced points are then rendered twice using two separate perspective viewing volumes. When viewed without proper stereo hardware, the area within the lens appears doubled. The distance between a point rendered by the right viewing volume and the same point rendered with the left viewing volume is called "parallax". The greater the parallax, the more an object appears to be off the plane of the display screen. The height of a data point and the horizontal distance between the two viewing volumes (i.e. the eye separation), controls the amount of parallax. Too much parallax is uncomfortable to view as described in reference 2.
The maximum amount of parallax on a lens will be in its focal region.
Typically, an image being viewed with a PDT lens has a finite resolution. With this information the system calculates the height of a lens when it has magnified the image to the limit of its resolution. Using this maximum height the system can adjust the eye separation such that the maximum parallax will not be uncomfortable. In the context of images with infinite resolution such as vector data, the maximum height of the lens is chosen based on some maximum amount of compression allowed in the shoulder for a lens of some average size. When considering the maximum parallax the system may also need to take into account the additional parallax on the image if it is itself stereoscopic, and decrease the eye separation accordingly. Because viewing discomfort varies from user to user, it is necessary to also provide manual configuration of eye separation.
Applying PDT lenses to stereoscopically paired images PDT lenses are applied to stereoscopically paired images by displacing the points on both images and rendering the left and right image consecutively using perspective projection.
We can save time by calculating the displacements only once on a finitely subdivided mesh, and consecutively texture-mapping the right and left image on the mesh.
Using proper stereo viewing hardware, the images will have their original stereo effect where they are not distorted by a lens. In the lensed areas, the stereo effect will be intensified in the focal region and generally reduced in the shoulder. Only the areas of the shoulder that compress the data horizontally will decrease the parallax. On all areas of the shoulder the perception of depth will be affected by the steepness of the shoulder.
A simpler approach would be to create red/blue anaglyphs of the paired images and render that image just as we would a mono image. In this case, no special hardware is necessary beyond red/blue glasses.
Viewing stereoscopically paired images with stereoscopic lenses There is incongruence in viewing stereoscopically paired image with non-stereo lenses.
The lack of depth in the lenses can be disturbing because the user is accustomed to looking for depth in the image and there are strong monocular cues that the lens is in fact 3-dimensional. We can combine the stereo viewing techniques described above to view stereoscopically paired images with stereoscopically rendered lenses. The effect will be to lift the zero parallax setting (ZPS) of the image by the height of the lens in the focal region and shoulder. That is, if an area of the image appeared to be sunk into the screen it will appear to be sunk in to the lens. Similarly, if an area of the image appeared to in front of the screen, it will appear to be higher than the lens. Note that the eye separation used for the stereo lenses will not affect the parallax of the image. It strictly influences the depth perception of the lenses. Again, it is necessary to provide manual configuration of eye separation to vary the depth perception of the lenses depending on the application.
User interface techniques for stereoscopic lenses A user interface technique for non-stereo PDT lenses has been covered in ~ a previous patent application. We extend this technique to stereo lenses by rendering the controls in stereo where it is desirable to do so. Because the focal region of a stereoscopic lens appears to be in front of the screen, we need to render the focal region user interface control in stereo such that it appears at the same height as the focal region.
We do this by adding a height to the control and rendering it twice, once with a left-eye viewing
2 volume, and once with a left-eye viewing volume; the same viewing volumes used to render the lenses.
Other useful user interface techniques for stereo viewing are controls for controlling the eye separation, and controlling the ZPS of the image and mesh separately.
Varying the horizontal offset of the images on the mesh controls the ZPS of the image.
Varying the horizontal offset of the mesh controls its ZPS. Note that because the images axe texture-mapped onto the mesh, when we change the ZPS of the mesh, the ZPS of the stereoscopic image stays constant in relation to it. That is, even if we move the mesh into the screen, all objects that originally appeared above the mesh will still appear above the mesh. The technique of varying the ZPS of the mesh can be used as an alternative to changing the eye separation when the parallax on the lens is uncomfortably large.
Potential application areas In general, stereo lenses can be used in any application that uses non-stereo lenses. If stereo hardware is available, it can be more intuitive to work with stereo lenses even on mono images. There are applications that already use stereoscopic pairs and it is those applications that would more directly benefit from stereo PDT lenses. One such application is used to view stereo satellite imagery. This type of imagery is particularly suited to stereo PDT because the data is mostly planar (in line with the screen plane) with small depth differences.
Stereo lenses can also be used as a tool to help communicate the metaphor of PDT lenses as operating on elastic surfaces. Such a tool would be useful in marketing or training areas.
Stereo lenses could also be used on computer-generated 3D worlds to afford a new way of navigating or enhancing such worlds.
References 1. M. S. T. Carpendale, A Framework for Elastic Presentation Space, Ph.D.
Thesis, Simon Fraser University, Burnaby, BC, Canada 1992 (incorporated herein by reference).
2. Valyrus, N.A., Stereoscopy, Focal Press, London, 1966 (incorporated herein by reference).
Other useful user interface techniques for stereo viewing are controls for controlling the eye separation, and controlling the ZPS of the image and mesh separately.
Varying the horizontal offset of the images on the mesh controls the ZPS of the image.
Varying the horizontal offset of the mesh controls its ZPS. Note that because the images axe texture-mapped onto the mesh, when we change the ZPS of the mesh, the ZPS of the stereoscopic image stays constant in relation to it. That is, even if we move the mesh into the screen, all objects that originally appeared above the mesh will still appear above the mesh. The technique of varying the ZPS of the mesh can be used as an alternative to changing the eye separation when the parallax on the lens is uncomfortably large.
Potential application areas In general, stereo lenses can be used in any application that uses non-stereo lenses. If stereo hardware is available, it can be more intuitive to work with stereo lenses even on mono images. There are applications that already use stereoscopic pairs and it is those applications that would more directly benefit from stereo PDT lenses. One such application is used to view stereo satellite imagery. This type of imagery is particularly suited to stereo PDT because the data is mostly planar (in line with the screen plane) with small depth differences.
Stereo lenses can also be used as a tool to help communicate the metaphor of PDT lenses as operating on elastic surfaces. Such a tool would be useful in marketing or training areas.
Stereo lenses could also be used on computer-generated 3D worlds to afford a new way of navigating or enhancing such worlds.
References 1. M. S. T. Carpendale, A Framework for Elastic Presentation Space, Ph.D.
Thesis, Simon Fraser University, Burnaby, BC, Canada 1992 (incorporated herein by reference).
2. Valyrus, N.A., Stereoscopy, Focal Press, London, 1966 (incorporated herein by reference).
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002361341A CA2361341A1 (en) | 2001-11-07 | 2001-11-07 | Use of detail-in-context presentation on stereoscopically paired images |
| US10/289,453 US7088364B2 (en) | 2001-11-07 | 2002-11-07 | Method and system for displaying stereoscopic detail-in-context presentations |
| US11/410,024 US7737976B2 (en) | 2001-11-07 | 2006-04-25 | Method and system for displaying stereoscopic detail-in-context presentations |
| US12/764,724 US8400450B2 (en) | 2001-11-07 | 2010-04-21 | Method and system for displaying stereoscopic detail-in-context presentations |
| US13/845,442 US8947428B2 (en) | 2001-11-07 | 2013-03-18 | Method and system for displaying stereoscopic detail-in-context presentations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002361341A CA2361341A1 (en) | 2001-11-07 | 2001-11-07 | Use of detail-in-context presentation on stereoscopically paired images |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2361341A1 true CA2361341A1 (en) | 2003-05-07 |
Family
ID=4170446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002361341A Abandoned CA2361341A1 (en) | 2001-11-07 | 2001-11-07 | Use of detail-in-context presentation on stereoscopically paired images |
Country Status (2)
| Country | Link |
|---|---|
| US (4) | US7088364B2 (en) |
| CA (1) | CA2361341A1 (en) |
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-
2001
- 2001-11-07 CA CA002361341A patent/CA2361341A1/en not_active Abandoned
-
2002
- 2002-11-07 US US10/289,453 patent/US7088364B2/en not_active Expired - Lifetime
-
2006
- 2006-04-25 US US11/410,024 patent/US7737976B2/en not_active Expired - Fee Related
-
2010
- 2010-04-21 US US12/764,724 patent/US8400450B2/en not_active Expired - Fee Related
-
2013
- 2013-03-18 US US13/845,442 patent/US8947428B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US7088364B2 (en) | 2006-08-08 |
| US8400450B2 (en) | 2013-03-19 |
| US20100201785A1 (en) | 2010-08-12 |
| US20060192780A1 (en) | 2006-08-31 |
| US20130222372A1 (en) | 2013-08-29 |
| US20030112503A1 (en) | 2003-06-19 |
| US8947428B2 (en) | 2015-02-03 |
| US7737976B2 (en) | 2010-06-15 |
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