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FIG Working Week 2011 Bridging the Gap between Cultures Marrakech, Morocco, 1822 May 2011 1 Chromostereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth Kingston The University of Plymouth Aim & Objectives Assess the usefulness of CS when applied obliquely and users group acceptance Create models of marine application represented with CS Select users sample Assess 3D perception Cartographic factors Colour conventions Shading View angle 05/06/2011 2 Abdel Hamid et. al. ‘Chromostereoscopy for Enhanced Viewing in Opaque Environment’ FIG Week 2011 Marrakech

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Page 1: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 1

Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment

Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth Kingston

The University of Plymouth

Aim & Objectives

• Assess the usefulness of CS when applied obliquely and users group acceptance

• Create models of marine application represented with CS

• Select users sample

• Assess

– 3D perception

– Cartographic factors

• Colour conventions

• Shading

• View angle

05/06/2011 2Abdel Hamid et. al.  ‘Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Page 2: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 2

What is CS

05/06/2011 3Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

CS in Hydrography

• CS in 2D bathymetric display (CHS, 1997)• Oblique CS:  DTM and hydrographic data (Ostnes, 2005)

Image of seafloor generated from EM1000 multi‐beam data collected on the FG Creed by the Canadian Hydrographic Service ‐Atlantic

05/06/2011 4Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Page 3: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 3

Rotating DTM

05/06/2011 5Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Navigation Scenario

05/06/2011 6Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Page 4: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 4

Test responder

Professional navigators (10)

Users Sample (30)

Recreational navigators (10)

Divers (10)

Marine Environment

Water surface Underwater

05/06/2011 7Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

CS advantages and disadvantages

Scenario User group key positive Key negative

DTM display

Navigators

UnfamiliarityRecr. Sailors Proximity senseEstimate shoal distanceDivers

NavigationScenario

Navigators Situation awareness in fogPotential Confusion

Recr. SailorsAnti‐collision  visual alarm

Divers

Underwater Scenario

NavigatorsAdditional source of 

information in isolation‐

Recr. Sailors

Divers Pre‐trip briefing

05/06/2011 8Abdel Hamid et. al.  ‘Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment’

FIG Week 2011 Marrakech

Page 5: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 5

DTM of Plymouth Sound without shading

05/06/2011 9Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

With Shading

05/06/2011 10Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Page 6: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 6

CS and View angle

05/06/2011 11Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Cartographicelement

Normal use With CS effect

Colourconvention

Categorise objectsand signal information

May cause confusion

ShadingDetails about surface 

reliefDistance estimation to and

between objects 

View angleReveal obscure 

objects

Enhance understanding when seen from poor 

viewpoints

CS and some cartographic elements

05/06/2011 12Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

Page 7: Chromo stereoscopy for Enhanced Opaque Environment€¦ · Chromo‐stereoscopy for Enhanced Viewing in Opaque Environment Iman Abdel Hamid, Victor Abbott, Samantha Lavender and Kenneth

FIG Working Week 2011Bridging the Gap between CulturesMarrakech, Morocco, 18‐22 May 2011 7

Summary

• CS is a cheap and useful method to display 3D scenes in apparent stereovision

• Unfamiliarity issue could be solved by training

• CS with traditional 3D enhancements (such as shading and changing view angle) augments 3D perception

• CS could be a useful training tool for marine environment users:

– Briefing divers for new diving areas

– Highlighting navigation hazards

05/06/2011 13Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech

[email protected]

05/06/2011 14Abdel Hamid et. al.  ‘Chromo‐stereoscopy 

for Enhanced Viewing in Opaque Environment’  FIG Week 2011 Marrakech