CA2618989A1 - Method for stitching multiple converging paths - Google Patents
Method for stitching multiple converging paths Download PDFInfo
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- CA2618989A1 CA2618989A1 CA002618989A CA2618989A CA2618989A1 CA 2618989 A1 CA2618989 A1 CA 2618989A1 CA 002618989 A CA002618989 A CA 002618989A CA 2618989 A CA2618989 A CA 2618989A CA 2618989 A1 CA2618989 A1 CA 2618989A1
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- path segments
- label
- map
- path
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- 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
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/37—Details of the operation on graphic patterns
- G09G5/377—Details of the operation on graphic patterns for mixing or overlaying two or more graphic patterns
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
- G01C21/367—Details, e.g. road map scale, orientation, zooming, illumination, level of detail, scrolling of road map or positioning of current position marker
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
- G01C21/3673—Labelling using text of road map data items, e.g. road names, POI names
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
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- 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
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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
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- 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
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- G06T11/00—2D [Two Dimensional] image generation
- G06T11/60—Editing figures and text; Combining figures or text
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/0969—Systems involving transmission of navigation instructions to the vehicle having a display in the form of a map
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/10—Map spot or coordinate position indicators; Map reading aids
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/10—Map spot or coordinate position indicators; Map reading aids
- G09B29/106—Map spot or coordinate position indicators; Map reading aids using electronic means
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- 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
- G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2219/00—Indexing scheme for manipulating 3D models or images for computer graphics
- G06T2219/004—Annotating, labelling
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- 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
- G09G2340/0492—Change of orientation of the displayed image, e.g. upside-down, mirrored
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- 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
- G09G2340/10—Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
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- 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 of stitching converging path segments to aesthetically label Y-intersections, path bifurcations or splits in roads or the like entails determining which pair of adjacent path segments subtend the largest angle. The path segments subtending the largest angle are reconstructed (stitched together) and a single instance of the label is then rendered along the reconstructed path. Although this stitching can be performed on the client device, prestitching server-side is even more efficient in terms of economizing over-the-air bandwidth and 6 processing resources.
Claims (14)
1. A method of stitching multiple converging paths of a map to be displayed on a wireless communications device, the method comprising steps of:
providing map data for rendering the map on a display of the device, the map data comprising label data for labelling paths on the map;
identifying at least three path segments that converge to a common point on the map, each of the path segments having an identical label;
determining an angle subtended by each pair of adjacent path segments in order to identify which pair of adjacent path segments subtends the largest angle; and generating a reconstructed path by stitching together the pair of adjacent path segments subtending the largest angle.
providing map data for rendering the map on a display of the device, the map data comprising label data for labelling paths on the map;
identifying at least three path segments that converge to a common point on the map, each of the path segments having an identical label;
determining an angle subtended by each pair of adjacent path segments in order to identify which pair of adjacent path segments subtends the largest angle; and generating a reconstructed path by stitching together the pair of adjacent path segments subtending the largest angle.
2. The method as claimed in claim 1 further comprising a step of rendering a single instance of the label along the reconstructed path.
3. The method as claimed in claim 1 or claim 2 wherein the steps of identifying, determining and generating are performed on a server.
4. The method as claimed in claim 1 or claim 2 wherein the steps of identifying, determining and generating are performed on a wireless communications device.
5. The method as claimed in any one of the preceding claims wherein the step of determining the angle subtended by each pair of adjacent path segments comprises steps of:
determining vector directions for each of the path segments at the common point where the path segments converge; and computing angles between adjacent vectors.
determining vector directions for each of the path segments at the common point where the path segments converge; and computing angles between adjacent vectors.
6. The method as claimed in claim 2 and any one of claims 3 to 5 when dependent on claim 2 wherein the step of rendering a single instance of the label comprises steps of:
determining a center of the reconstructed path; and verifying whether placement of the label at the center of the reconstructed path interferes with any other label.
determining a center of the reconstructed path; and verifying whether placement of the label at the center of the reconstructed path interferes with any other label.
7. The method as claimed in any one of the preceding claims wherein the step of identifying at least three path segments that converge to a common point on the map comprises a step of identifying a Y-intersection having exactly three path segments.
8. The method as claimed in any one of the preceding claims wherein the step of determining an angle in order to identify which pair of adjacent path segments subtends the largest angle comprises a further step of determining, in a case where two of the largest angles are equal, which of the adjacent path segments would result in a more horizontally level label.
9. A computer program product comprising a computer-readable medium having code executable by a processor of a computing system for causing said computing system to perform the method of any one of claims 1 to 8.
10. A wireless communications device for enabling a user of the device to display a map on the device, the wireless device comprising:
an input device for enabling the user to cause the device to obtain map data for rendering the map to be displayed on a display of the device, the map data comprising label data for labelling paths on the map; and a memory for storing code to instruct a processor to:
identify at least three path segments that converge to a common point on the map, each of the path segments having an identical label;
determine an angle subtended by each pair of adjacent path segments in order to identify which pair of adjacent path segments subtends the largest angle;
generate a reconstructed path by stitching together the pair of adjacent path segments subtending the largest angle; and render a single instance of the label along the reconstructed path.
an input device for enabling the user to cause the device to obtain map data for rendering the map to be displayed on a display of the device, the map data comprising label data for labelling paths on the map; and a memory for storing code to instruct a processor to:
identify at least three path segments that converge to a common point on the map, each of the path segments having an identical label;
determine an angle subtended by each pair of adjacent path segments in order to identify which pair of adjacent path segments subtends the largest angle;
generate a reconstructed path by stitching together the pair of adjacent path segments subtending the largest angle; and render a single instance of the label along the reconstructed path.
11. The wireless communications device as claimed in claim wherein the processor is arranged to determine the angle subtended by each pair of adjacent path segments by:
determining vector directions for each of the path segments at the common point where the path segments converge; and computing angles between adjacent vectors.
determining vector directions for each of the path segments at the common point where the path segments converge; and computing angles between adjacent vectors.
12. The wireless communications device as claimed in claim or claim 11 wherein the processor is arranged to render a single instance of the label by:
determining a center of the reconstructed path; and verifying whether placement of the label at the center of the reconstructed path interferes with any other label.
determining a center of the reconstructed path; and verifying whether placement of the label at the center of the reconstructed path interferes with any other label.
13. The wireless communications device as claimed in any one of claims 10 to 12 wherein the processor is arranged to identify at least three path segments that converge to a common point on the map by identifying a Y-intersection having exactly three path segments.
14. The wireless communications device as claimed in any one of claims 10 to 13 wherein the processor is further arranged to determine, in a case where two of the largest angles are equal, which of the adjacent path segments would result in a more horizontally level label.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78754106P | 2006-03-31 | 2006-03-31 | |
US78843406P | 2006-03-31 | 2006-03-31 | |
EP07101280.1 | 2007-01-26 | ||
EP07101280A EP1840516B1 (en) | 2006-03-31 | 2007-01-26 | Method for stitching multiple converging paths |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2618989A1 true CA2618989A1 (en) | 2008-07-26 |
CA2618989C CA2618989C (en) | 2011-05-17 |
Family
ID=37037009
Family Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2575071A Active CA2575071C (en) | 2006-03-31 | 2007-01-24 | Method of graphically indicating on a wireless communications device that map data is still being downloaded |
CA2575289A Active CA2575289C (en) | 2006-03-31 | 2007-01-24 | Method of applying a spherical correction to map data for rendering direction-of-travel paths on a wireless communications device |
CA2575287A Active CA2575287C (en) | 2006-03-31 | 2007-01-24 | Method of displaying labels on maps of wireless communications devices using pre-rendered characters |
CA002581696A Active CA2581696C (en) | 2006-03-31 | 2007-03-14 | Method of labelling a highly curved path on a map rendered on a wireless communications device |
CA2582583A Expired - Fee Related CA2582583C (en) | 2006-03-31 | 2007-03-26 | Stitching of paths for improved text-on-path rendering of map labels |
CA2582988A Active CA2582988C (en) | 2006-03-31 | 2007-03-29 | Real-time collision avoidance for map labels and symbols |
CA2618989A Active CA2618989C (en) | 2006-03-31 | 2008-01-25 | Method for stitching multiple converging paths |
CA2619116A Active CA2619116C (en) | 2006-03-31 | 2008-01-25 | Real-time spherical correction of map data |
Family Applications Before (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2575071A Active CA2575071C (en) | 2006-03-31 | 2007-01-24 | Method of graphically indicating on a wireless communications device that map data is still being downloaded |
CA2575289A Active CA2575289C (en) | 2006-03-31 | 2007-01-24 | Method of applying a spherical correction to map data for rendering direction-of-travel paths on a wireless communications device |
CA2575287A Active CA2575287C (en) | 2006-03-31 | 2007-01-24 | Method of displaying labels on maps of wireless communications devices using pre-rendered characters |
CA002581696A Active CA2581696C (en) | 2006-03-31 | 2007-03-14 | Method of labelling a highly curved path on a map rendered on a wireless communications device |
CA2582583A Expired - Fee Related CA2582583C (en) | 2006-03-31 | 2007-03-26 | Stitching of paths for improved text-on-path rendering of map labels |
CA2582988A Active CA2582988C (en) | 2006-03-31 | 2007-03-29 | Real-time collision avoidance for map labels and symbols |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2619116A Active CA2619116C (en) | 2006-03-31 | 2008-01-25 | Real-time spherical correction of map data |
Country Status (5)
Country | Link |
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US (13) | US20070229538A1 (en) |
EP (3) | EP1840515B1 (en) |
AT (3) | ATE447160T1 (en) |
CA (8) | CA2575071C (en) |
DE (3) | DE602006010025D1 (en) |
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