CA2323569A1 - Elastic presentation space - Google Patents

Elastic presentation space Download PDF

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Publication number
CA2323569A1
CA2323569A1 CA002323569A CA2323569A CA2323569A1 CA 2323569 A1 CA2323569 A1 CA 2323569A1 CA 002323569 A CA002323569 A CA 002323569A CA 2323569 A CA2323569 A CA 2323569A CA 2323569 A1 CA2323569 A1 CA 2323569A1
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CA
Canada
Prior art keywords
lens
eps
data
interest
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002323569A
Other languages
French (fr)
Inventor
David J. P. Baar
David J. Cowperthwaite
Mark H. A. Tigges
Robert Komar
Jerome F. Bauer
M. Sheelagh T. Carpendale
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ADVANCED NUMERICAL METHODS Ltd
Original Assignee
ADVANCED NUMERICAL METHODS Ltd
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4167405&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2323569(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ADVANCED NUMERICAL METHODS Ltd filed Critical ADVANCED NUMERICAL METHODS Ltd
Priority to CA002323569A priority Critical patent/CA2323569A1/en
Priority to AU2002210304A priority patent/AU2002210304A1/en
Priority to JP2002536993A priority patent/JP4410465B2/en
Priority to PCT/CA2001/001472 priority patent/WO2002033686A2/en
Priority to EP01978042A priority patent/EP1327235B1/en
Priority to CA002425990A priority patent/CA2425990A1/en
Priority to AT01978042T priority patent/ATE405915T1/en
Priority to DE60135475T priority patent/DE60135475D1/en
Priority to US09/978,773 priority patent/US6768497B2/en
Publication of CA2323569A1 publication Critical patent/CA2323569A1/en
Priority to US10/856,807 priority patent/US7256801B2/en
Priority to US10/858,671 priority patent/US20050041046A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/95—Retrieval from the web
    • G06F16/957—Browsing optimisation, e.g. caching or content distillation
    • G06F16/9577—Optimising the visualization of content, e.g. distillation of HTML documents
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F40/00—Handling natural language data
    • G06F40/10—Text processing
    • G06F40/103—Formatting, i.e. changing of presentation of documents
    • G06T3/053—
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04805—Virtual magnifying lens, i.e. window or frame movable on top of displayed information to enlarge it for better reading or selection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04806—Zoom, i.e. interaction techniques or interactors for controlling the zooming operation
    • 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
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/045—Zooming at least part of an image, i.e. enlarging it or shrinking it
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/14—Solving problems related to the presentation of information to be displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/14—Solving problems related to the presentation of information to be displayed
    • G09G2340/145—Solving problems related to the presentation of information to be displayed related to small screens

Abstract

A method for displaying visual information on a display screen of a computer, comprising the steps of scaling the visual information to produce a scaled representation to fit on the display screen the scaled representation containing the entire content of the visual information; selecting a region of interest within the scaled representation; applying a transformation to the scaled representation to improve the visual detail in the region of interest; and, displaying the transformed presentation on the display screen.

Description

Elastic Presentation Space Inventors: M.Sheelagh T. Carpendale, David J. Cowperthwaite, Mark H. A.
Tigges, Robert Komar, Jerome F. Bauer, David J. P. Baar Introduction The subject document describes specific usages and specific innovations related to the information presentation technology known as the "Elastic Presentation Space"' or "EPS". EPS refers to a collection of know-how and techniques for performing "detail-in-context viewing" (also known as "multi-scale viewing" and "distortion viewing") of information such as images, maps, and text, using a projection technique summarized below. EPS is applicable to multidimensional data, and is well suited to implementation on a computer for dynamic detail-in-context display on an electronic display surface such as a monitor. In the case of two dimensional data, EPS is typically 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 end result typically giving the appearance of a lens having been applied to the display surface. EPS has numerous advantages over conventional zoom, pan, and scroll technologies, including the capability of preserving the visibility of information outside the local region of interest.
EPS performs detail-in-context presentation of n-dimensional data through the use of a procedure wherein the data is mapped into a region in an (n+1) -dimensional space, manipulated through perspective projections in the (n+1) dimensional space, and then finally transformed back into n-dimensional space for presentation. For example, in two dimensions, EPS can be implemented through the projection of an image onto a reference plane (figure 1 ) in the following manner. The source image is located on a basal plane, and those regions of interest of the image for which magnification is desired are elevated so as to move them closer to a reference plane situated between the reference viewpoint and the reference view plane (RVP). Magnification of the "focal region"
closest to the RVP varies inversely with distance from the RVP. As shown in figure 1, compression of regions outside the focal region is a function of both distance from the RVP, and the gradient of the function describing the vertical distance from the RVP with respect to horizontal distance from the focal region. The resultant combination of magnification and compression of the image as seen from the reference viewpoint results in a lens-like effect similar to that of a magnifying glass applied to the image, and the resultant distorted image is referred to as a "pliable display surface". Hence, the various functions used to vary the magnification/compression of the image via vertical displacement from the basal plane are described as lenses, lens types, or lens functions. Lens functions that describe basic lens types with point and circular focal regions, as well as certain more complex lenses and advanced capabilities such as folding, have previously been described ~ .
Page 1 of 8.

Implementation Details and Improvements 1.1. Surface Generation Algorithms for Pliable Display Surfaces To achieve accurate magnification and optimize computational performance, pliable display surfaces for EPS are directly generated by sampling the distorted layout space and deriving a polygonal surface from sampled points. This technique has important advantages over approximation techniques such as the use of non-uniform rational b-splines (NURBS)2 to implement the surface:
The sample points are selected in such a manner as to provide a sufficient representation of the important features of the data space, including the undistorted regions at original magnification/compression levels, the regions that are within the focal areas of lenses, and finally the boundaries between these regions. The accurate sampling of boundaries is crucial to achieving correct magnification and is in some cases used in the eventual illumination of the surface to provide a perceptual cue to the user through the use of shading. The sample points are connected to form a grid via an appropriate triangulation algorithm (for example Delauney triangulation3) to form a continuous surface.
This surface is employed as a medium for the presentation of raster data via texture-mapping as well as to provide the perceptual shading cues revealing the topology of the distorted data space.
Direct generation of the surface from a set of sample points is superior to alternate methods such as the use of a NURBS surface for the following reasons: direct control over the triangulation of the surface in the regions where lenses pose distinct boundaries, full and accurate control over final magnification where approximated surfaces would result in areas of the surface that are over and under-magnified, and computing performance enhancements that result from decreasing the number of sample points in regions where additional detail is unnecessary. Use of a more dense grid pattern near the region of interest or anywhere the magnification or the slope of the lens function is large can be used to enhance the smoothness of the visible transition from context into the region of interest; the use of less dense grid pattern elsewhere is used to achieve improved computing performance through the use of an optimized grid pattern.
1.2. Special Lens types and enhancements 1.2.1. Use of EPS on Multilayer or Composite Information: Blending and Filtering Techniques 1.2.1. l .Blending between multiple sets of data within an EPS lens can be used to compare coincident regions of interest from different data sets or layers, for example to show detailed precipitation, population, and disease data in detail only in a particular region of interest.
1.2.1.2.Filtering of specific data characteristics or data layers within a lens:
The data shown within a lens can be filtered such that only data within the desired range or from a specific data layer is drawn. This has Page 3 of 8.

application used as a data inspection aid, for example, to quickly reveal areas in a geographic map having particularly high populations or disease frequencies.
1.3. User interface aspects and components: The following lens characteristics can be modified by specific user input via pointing devices or pointing device and keyboard keystroke operations 1.3.1. Control of magnification. Magnification control can be provided by a combination of either a keystroke or a single "tap" of a pointing device such as a stylus to indicate an imminent magnification change request, followed by a straight line stroke of the pointing device to actually set the new magnification in proportion to the distance travelled or velocity of the pointing device.
1.3.2. Control of lens shape may be provided by "dragging" a lens border with a pointing device. The result will be that the lens border distorts elastically to include the new pointing device position in set of points within the region of interest. In this manner, the user can directly specify changes in the shape of the lens using just a pointing device. This has importance in allowing the user to specify arbitrary lens shapes. Actual implementation of complex lens shapes is achieved by appending new lenses onto the original lens.
1.3.3. Control of lens size: a simpler case of 1.3.2; the lens borders are dragged using the pointing device to adjust the lens size.
2. Applications 2.1. Online and Electronic Presentation of Printed Media using EPS
("PliablePaperTM") This EPS application involves the electronic and/or online (internet) presentation of traditional printed media and printed documents, such as newspapers and magazines. It invokes the electronic scaling of the document content to a size that allows presentation of the full content on the display surface, with the use of specialized EPS
lenses to enlarge regions of interest to make them readable to the user (figure 2). It is also expected to be suitable for implementing other conventional printed media such as phone directories online. The ideas presented here may additionally be applicable to more effective presentation of web page content on small display surfaces such as handheld computers. It is anticipated that the application may implement pre-placed EPS "lenses" on important content components such as headlines, feature articles, tables of contents, and advertisements. Interaction with the reader might be such that articles in the reader's region of interest are enlarged automatically via EPS lenses of complex shape to suit the shape of the article or other area of interest.
Details of PliablePaper innovations (refer to Figure 2).
Page 4 of 8.

2.1.1. Implementation of pre-placed lenses: In order to provide the user with an immediate view of certain regions of a document, items of interest such as article headlines, whole articles, or advertisements will have lenses in place when the document is first viewed. This can be implemented, for example, through the use of special lens locating information (locating tags) embedded within the source document or in a separate data layer, indicating the characteristics, location and/or bounds of the lens.
2.1.2. Asymmetric, tapered lenses providing blending into the column of interest (see for example column 5 of figure 2). The use of such tapering of the lenses provides a direct visual connection and a smooth transition from magnified to unmagnified areas to facilitate the user's navigation of the document. The sides of the lens, which are unnecessary, are not drawn so as to improve performance and preserve the visibility of neighbouring columns where possible.
2.1.3. The partial cutting off of lines of text to facilitate blending in the distorted region of the lens. An example is shown in figure 2.
2.1.4. Handling of boundary conditions: Inward folding of lenses when a boundary such as a page border is encountered allows the magnification of a column immediately adjacent to the border by effectively shifting the lens contents inward.
Page 5 of 8.

Figure 2. "Pliable Parser": 2 pages from a newspaper have been effectively shrunk to fit a display surface. A lens has been used in the fifth column to increase the font size in the reader's region of interest. The top and bottom of the lens are tapered to provide a continuous transition to the unmagnified text. Partial overwriting of neighboring columns and images by the lens, rather than a lateral distortion, is performed to blend the lens into the undistorted regions, and provide enough space for the lens while preserving the spatial orientation of the neighboring columns.
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2.2.
Page 6 of 8.

2.3. Implementation of EPS as a Client/Server Application This application involves the implementation in software of EPS lenses within an interactive client-server application over a network. The client software can be self contained or could exist within an Internet browser as a "plug-in" or accessory. In the case of an Internet browser plug-in, the software will detect the presence of one or more data elements such as images within a web page, and allow application of EPS
lenses to these elements. The application components residing on the server computer would make multiple resolutions of the data available to the client on demand such that additional detail of the source data can be shown in the lens. The following are some of the application details; of particular concern are methods for minimizing network traffic between client and server in low-bandwidth situations.
EPS Client, Client-Server, and Server Application Notes 2.3.1. "Detail-on-demand" functionality: In the original display of a lens applied to data such as an image, the client software displays the focal region of the EPS lens in low resolution until the pointing device has paused or "hovered"
over a particular region of interest. If the lens remains in the same position for a period of time, additional data will be retrieved from the server to fill in additional detail in the magnified region and neighbouring regions (high resolution is beneficial in the neighbouring regions in blending the lens border into the context if the slope of the lens borders is large). This minimizes network traffic while the user is navigating over a region of the data rather than examining it in detail.
2.3.2. "Adaptive pre-fetching": This technique is used to improve response time (performance) of lenses to input from a pointing device by retrieving data from the server in advance of the need for it; it is a predictive technique. A
pointing device controls the lens position, and the acceleration, velocity and position of the device can be used to predict the next position of the lens.
In this manner, an estimate can be made of the next required high-resolution data, and it can be retrieved from the server over the network in advance of it being needed.
2.3.3. User interface aspects and components:
2.3.3.1.Response of lenses to pointing device "hovering" as described in 2.3.1 2.4. Control of EPS Lens by Global Positioning Satellite (GPS) receiver, cell phone, or other external data source:
In this application, EPS lens locations and/or parameters are controlled by an external data source such as a GPS receiver or cell phone. In the GPS case, an EPS lens location on a map shown on a display surface can be determined by physical location information provided by a GPS receiver coupled to the computer. In this manner, detailed navigational information in the user's vicinity can be provided in the context of a larger scale map. Alternately, location Page 7 of 8.

information provided automatically by a cellular phone system or network can be used to locate the device user and position a lens appropriately. Specific examples of uses of this innovation include enhanced automobile dashboard, marine, and aircraft navigation systems, as well as personal navigational aids on handheld computing devices. An additional enhancement to this would be to have a lens shaped to the intended path of the user from current location to destination.
2.5. Automatic motion: timed motion of EPS lens over data such as text to allow reading of text or scanning of image or map without the need for intervention by the user. This may have applications in multimedia, "PliablePaper", reading aids for the disabled, as well as in advertising.
2.6. EPS as a solution to the "labelling problem": A problem commonly encountered in labelling images and maps is that there is insufficient space for labels, particularly as the scale of a map changes and the details to be labelled are spatially dense. EPS provides a potential solution to this problem in the case of electronic display surfaces through capabilities such as detail-in-context viewing, folding' that allow the user to dynamically adjust the displayed level of detail and move undesired labels out of the line of sight of the user.
References Cited 1. M. S. T. Carpendale, A Framework for Elastic Presentation Space, Ph.D.
Thesis, Simon Fraser University, Burnaby, BC, Canada 1992 2. A. Watt and M. Watt, Advanced Animation and Rendering Techniques, Addison-Wesley Publishing, 1992, 106-108
3. Boots, B.N., "Delauney triangles: An Alternative approach to point pattern analysis."
Proc. Assoc. Am. Geogr. 6 (1974), 26-29 Page 8 of 8.

Claims
CA002323569A 2000-10-18 2000-10-18 Elastic presentation space Abandoned CA2323569A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
CA002323569A CA2323569A1 (en) 2000-10-18 2000-10-18 Elastic presentation space
US09/978,773 US6768497B2 (en) 2000-10-18 2001-10-18 Elastic presentation space
EP01978042A EP1327235B1 (en) 2000-10-18 2001-10-18 Elastic presentation space
JP2002536993A JP4410465B2 (en) 2000-10-18 2001-10-18 Display method using elastic display space
PCT/CA2001/001472 WO2002033686A2 (en) 2000-10-18 2001-10-18 Elastic presentation space
AU2002210304A AU2002210304A1 (en) 2000-10-18 2001-10-18 Elastic presentation space
CA002425990A CA2425990A1 (en) 2000-10-18 2001-10-18 Elastic presentation space
AT01978042T ATE405915T1 (en) 2000-10-18 2001-10-18 ELASTIC DISPLAY AREA
DE60135475T DE60135475D1 (en) 2000-10-18 2001-10-18 ELASTIC DISPLAY AREA
US10/856,807 US7256801B2 (en) 2000-10-18 2004-06-01 Elastic presentation space
US10/858,671 US20050041046A1 (en) 2000-10-18 2004-06-02 Elastic presentation space

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002323569A CA2323569A1 (en) 2000-10-18 2000-10-18 Elastic presentation space

Publications (1)

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CA2323569A1 true CA2323569A1 (en) 2002-04-18

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CA002323569A Abandoned CA2323569A1 (en) 2000-10-18 2000-10-18 Elastic presentation space

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US (3) US6768497B2 (en)
EP (1) EP1327235B1 (en)
JP (1) JP4410465B2 (en)
AT (1) ATE405915T1 (en)
AU (1) AU2002210304A1 (en)
CA (1) CA2323569A1 (en)
DE (1) DE60135475D1 (en)
WO (1) WO2002033686A2 (en)

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