Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Color and textures interpolation for homogeneous sliding between orthoimagery and vector data (Charlotte Hoarau)

5,612 views

Published on

Graphic interfaces of geoportals allow visualizing, sometimes overlaying often by image blending, various data and representations of geographical spaces: vector data, maps, aerial imagery, Digital Terrain Model (DTM), etc. After some previous works it appears that image blending is insufficient to allow efficient co-visualization of orthoimagery and vector data. Our purpose is to be able to manage an hybrid visualization of orthoimagery and vector data, efficient and useful. The diversity of hybridization levels requires to be able to control a continuum between such data. We thus have to propose rendering methods to mix heterogeneous data, in order to propose homogeneous and continuous intermediary representations. This paper proposes a methodology to interpolate graphic parameters between an orthoimage and related vector data, to control the level of orthophotorealism, all along the continuum. We detail the methodology based on several interpolation components, to control abstraction and realism levels, by manipulating colors and textures (natural, procedural or mixed).

Published in: Science
  • Be the first to comment

  • Be the first to like this

Color and textures interpolation for homogeneous sliding between orthoimagery and vector data (Charlotte Hoarau)

  1. 1. Color and Texture Interpolation Between Orthoimagery and Vector Data Charlotte Hoarau, Sidonie Christophe GeoVIS - ISPRS GeoSpatial Week - Thursday, October 1srt 2015
  2. 2. CONTEXT and CHALLENGES Hybrid visualization between maps and imagery
  3. 3. 3C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Long term purpose  Modelisation of the cartographic style  Style navigation between cartographic representations → Design method to create Cartographic Continuum Topographic Map Imagery
  4. 4. 4C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Design challenges Create efficient hybrid visualizations → Avoid global image blending by transparency → Understand the perception of conveyed information → Create smooth transition to help cognitive tasks (such as feature recognition, territory comprehension, etc.)
  5. 5. 5C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Heterogeneous visual perception 02.07.1
  6. 6. 6C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week  Abstract representation of the real world “All maps are abstractions of the reality” [Robinson et Al. 95]  Information is identified, interpreted, structured and hierarchised  Abstraction steps in the cartographic process  Data selection  Data generalization  Data symbolization Topographic map perception
  7. 7. 7C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Imagery perception  Realistic representation from the sky  Photo-realism effect  Automated acquisition  Continuous representation  Non encoded information  Increased credibility in a “ground truth”  Difficult to interpret as “raw” data
  8. 8. 8C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Question research Orthoimagery Topographic map  How to merge them into an hybrid visualization ?  How to create visual and progressive transitions ?
  9. 9. METHODOLOGY Visual properties interpolation
  10. 10. 10C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Mixing imagery and vector data Vector Cartographic Database Raster Imagery Database Hybrid Visualization
  11. 11. 11C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Merging visual properties : Color and Texture  From the map : bright colors (conventional or abstract)  From the imagery : natural textures and colors  Procedural rendering methods
  12. 12. 12C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Methodology Determining pivot symbolizations
  13. 13. 13C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Pivot symbolization  Using endings visual properties
  14. 14. 14C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Pivot symbolization  Using endings visual properties
  15. 15. 15C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Methodology Determining pivot symbolizations Interpolating Symbolization parameters
  16. 16. 16C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Color interpolation Applied to the hydrography Map color Natural color
  17. 17. 17C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Raster Color Interpolation
  18. 18. 18C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Applied to buildingsgs Natural texture interpolation Plain color Transparent color
  19. 19. 19C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Procedural texture interpolation Applied to the vegetation Procedural texturePlain color
  20. 20. 20C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week  How to choose pivot symbolizations ?  How to combine parameter interpolations ? Interpolation parameterization 02.07.1
  21. 21. 21C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week  How to synchronize cartographic themes ?? Imagery Map 02.07.1 Interpolation parameterization Using the perceived realism level
  22. 22. 22C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Interactive online user test 02.07.1
  23. 23. 23C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week  The texture is more relevant to control the realism level  Validation of one interpolation combination Main results on realism perception 02.07.1
  24. 24. CARTOGRAPHIC RESULTS Realism-Abstraction Continuum
  25. 25. 25C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Continuum design
  26. 26. 26C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Continuum design
  27. 27. 27C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Continuum design
  28. 28. 28C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Continuum design Color Interpolation Texture Interpolation
  29. 29. 29C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Continuum design Color Interpolation Texture Interpolation
  30. 30. 30C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  31. 31. 31C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  32. 32. 32C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  33. 33. 33C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  34. 34. 34C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  35. 35. 35C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  36. 36. 36C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum Style IGN Style OSM
  37. 37. 37C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum Style IGN Style OSM
  38. 38. 38C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum Style IGN Style OSM
  39. 39. 39C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum Style IGN Style OSMStyle IGN Style OSM
  40. 40. 40C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum Style IGN Style OSM
  41. 41. 41C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic Continuum
  42. 42. CONCLUSION and PERSPECTIVES Hybrid visualization between maps and imagery
  43. 43. 43C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week Cartographic continuum design  Interpolating color and texture properties allows to create smooth graphic transitions → How to evaluate the evolution of the perception by merging representations ?
  44. 44. 44C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week  Integration of continuum in multiplexing tools → How to support specific cognitive tasks ? Interaction with cartographic continuum
  45. 45. Color and Texture Interpolation Between Orthoimagery and Vector Data Charlotte Hoarau, Sidonie Christophe GeoVIS - ISPRS GeoSpatial Week - Thursday, October 1srt 2015

×