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Color and Texture InterpolationBetween Orthoimagery and Vector Data
Charlotte Hoarau, Sidonie ChristopheGeoVIS - ISPRS GeoSpatial Week - Thursday, October 1srt 2015
CONTEXT and CHALLENGES
Hybrid visualization between maps and imagery
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
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.)
5C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Heterogeneous visual perception
02.07.15
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
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
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 ?
METHODOLOGY
Visual properties interpolation
10C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Mixing imagery and vector data
VectorCartographic
Database
RasterImagery
Database
HybridVisualization
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
12C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Methodology
Determining pivot
symbolizations
13C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Pivot symbolization
Using endings visual properties
14C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Pivot symbolization
Using endings visual properties
15C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Methodology
Determining pivot
symbolizations
Interpolating
Symbolization
parameters
16C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Color interpolation
Applied to the hydrography
Map color Natural color
17C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Raster Color Interpolation
18C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Applied to buildingsgs
Natural texture interpolation
Plain color Transparent color
19C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Procedural texture interpolation
Applied to the vegetation
Procedural texturePlain color
20C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
How to choose pivot symbolizations ?
How to combine parameter interpolations ?
Interpolation parameterization
02.07.15
21C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
How to synchronize cartographic themes ??
Imagery Map
02.07.15
Interpolation parameterization
Using the perceived realism level
22C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Interactive online user test
02.07.15
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
02.07.15
CARTOGRAPHIC RESULTS
Realism-Abstraction Continuum
25C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Continuum design
26C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Continuum design
27C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Continuum design
28C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Continuum design
Color Interpolation Texture Interpolation
29C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Continuum design
Color Interpolation Texture Interpolation
30C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
31C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
32C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
33C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
34C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
35C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
36C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
Style IGN Style OSM
37C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
Style IGN Style OSM
38C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
Style IGN Style OSM
39C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
Style IGN Style OSMStyle IGN Style OSM
40C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
Style IGN Style OSM
41C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Cartographic Continuum
CONCLUSION and PERSPECTIVES
Hybrid visualization between maps and imagery
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 ?
44C. Hoarau, S. Christophe GeoVIS – ISPRS GeoSpatial Week
Integration of continuum in multiplexing tools
→ How to support specific cognitive tasks ?
Interaction with cartographic continuum
Color and Texture InterpolationBetween Orthoimagery and Vector Data
Charlotte Hoarau, Sidonie ChristopheGeoVIS - ISPRS GeoSpatial Week - Thursday, October 1srt 2015