photogrammetry for architecture and construction
TRANSCRIPT
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Session 3.1: Photogrammetry for Site and Exterior/Interior Architecture
Dat Lien and Xavier LoayzaAxoscape
(Please take a moment to install a QR code reader app)
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AgendaTopicsPhotogrammetry 101Data captureData processingInformation Sharing and Sample outputs
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Photogrammetry 101DefinitionMeasure of physical objects (geometry) from images.
Computer visionStereoscopy ->“Depth illusion”
object point coordinate
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Photogrammetry 101DefinitionMeasure of physical objects (geometry) from images.
Computer visionStereoscopy ->“Depth illusion”
common pointcommon point
object point coordinate
Image 01:x,y,z camera coordinatespitch,yaw,roll camera orientationcamera characteristics
Image 01:x,y,z camera coordinatespitch,yaw,roll camera orientationcamera characteristics
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ApplicationsSurveying, City PlanningClash DetectionGamificationAR/VRFacade reconstructionSun analysisProject monitoringProject PlanningProject Safety
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PhotogrammetryModern Workflow (Walkthrough)
Data capture Data processing Output
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Data Capture
VehiclePayloadsMission Plan
OverlapOther Sensors
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Data CaptureVehicles Payloads
VS.
WING MULTI-ROTOR
WING MULTI-ROTOR
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Data Capture - PayloadsFrom
NON-VISIBLE SPECTRUM STEREO
LASER
VISIBLE SPECTRUM
Videos Images
EXISTING 3D DATA
NEAR INFRARED (NIR)
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Data Capture - UAVsLegal Aspect: 333 ExemptionBy law, any aircraft operation in the national airspace requires
1.Certificated and registered aircraft 2.A licensed pilot3.Operational approval 4.Small Unmanned Aircraft Regulations (Part 107)
Updated as of June 21, 2016!
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Data Capture - UAVsLegal Aspect: 333 ExemptionSection 333 of the FAA Modernization and Reform Act of 2012 grants the Secretary of Transportation the authority to determine whether an airworthiness certificate is required for a UAS to operate safely in the NAtional Airspace System (NAS)
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Data Capture - UAVsLegal Aspect: 333 Exemptionhttps://www.faa.gov/uas/legislative_programs/section_333/
Come visit our booth for a usb thumb drive with a section333 exemption template.
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Small Unmanned Aircraft Regulations (Part 107)
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Small Unmanned Aircraft Regulations (Part 107)Summary of Part 107:
400’
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Data Capture - UAVsUAV Table
UAV Name Photo Price Flight Time Features
Solo (3DR) $999-$1500 20 minAuto-pilot for
planning missions
Iris+ (3DR) $599-$1200 15 minAuto-pilot for
planning missions
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Data CaptureMission Plan
Can you Identify the potential issues?
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Data CaptureMission Plan
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Data CaptureAlways plan...
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Photogrammetry 101Mission Plan
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Data CaptureOverlapExterior environments Interior environments
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Data CaptureOverlapFor Exteriors
• 75% Frontal overlap (FO)
• 60% Side overlap (SO)
For Interiors• 90% overlap
75%
60%
FRONT OVERLAP
SIDE OVERLAP
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Data CaptureOverlapUrban mapping (Orthomosaic)
• Single Grid• Not suitable for 3d outputs• NADIR camera angle
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Data CaptureOverlapUrban 3d reconstruction
• Double Grid• 10° - 35° camera angle
camera angle
Building 3d reconstruction• Multiple heights• 30° - 45° camera angle• Every 5° - 10° (around)
camera angle
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Data CaptureFrom Existing 3D DataBIM Contest 2016
Screen capture (Fly SIM)
Collected from 3d Data
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Data Capture - Existing DataFrom Existing 3D DataBIM Contest
WORKFLOW FOR BUILDINGS(.fbx)
PHOTOGRAM. WORKFLOW (.fbx-.obj)
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Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
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Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
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Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
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Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
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Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
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Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
![Page 34: Photogrammetry for Architecture and Construction](https://reader036.vdocuments.mx/reader036/viewer/2022081515/589a91ce1a28abae648b5751/html5/thumbnails/34.jpg)
Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
![Page 35: Photogrammetry for Architecture and Construction](https://reader036.vdocuments.mx/reader036/viewer/2022081515/589a91ce1a28abae648b5751/html5/thumbnails/35.jpg)
Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
![Page 36: Photogrammetry for Architecture and Construction](https://reader036.vdocuments.mx/reader036/viewer/2022081515/589a91ce1a28abae648b5751/html5/thumbnails/36.jpg)
Data Capture - PayloadExisting ConditionsCamera trigger
By time frequencyBy distanceBy coordinates
Weather conditionsLightWind
Easy/Difficult surfaces
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Photogrammetry 101Modern Workflow
Data capture Data processing Output
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Data ProcessingData ProcessingValid imagesCommon pointsCamara estimations
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Data ProcessingSoftwareRecap 360Pix4dPhotoscanOpen Drone MapContext Capture
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Data ProcessingRecap 360
• Cloud processing and Off-line• Few steps -> Less user control• Autodesk compatibility
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Recap 360 -> Upload photos
Photo to 3D
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Recap 360 -> Locate survey points
Photo to 3D
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Recap 360 -> Setting up Output
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Recap 360 -> Setting up Output
Autodesk Remake
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Data ProcessingPix4D
• Off-line processing• More user control• Generic compatibility
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Pix4D -> New Project
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Pix4D -> Select Images
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Pix4D -> Image Properties
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Pix4D
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Data ProcessingComparison Matrix
Price Dataset size OS
Pix4D Medium 2000 images* Win, Mac (Beta), Linux
Recap 360 PRO Low 250 images Cloud
Agisoft Low 10000 images* Win, Mac, Linux
ContextCapture High no limit Win, Mac
OpenDroneMap Open source - Ubuntu
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Data ProcessingPricing
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Data ProcessingPricing
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Data ProcessingResulting Mesh Comparison
Recap vs Pix4d
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PhotogrammetryModern Workflow
Data capture Data processing Output
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Output
OrthomosaicPoint cloud3d mesh
Orthomosaic Point cloud 3d mesh
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What are my options from now?
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Mesh to Revit - Meshlab
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Mesh to Revit - Meshlab
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Mesh to Revit - Meshlab
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Mesh to Revit - Meshlab
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Mesh to Revit - OBJ/FBX to DXFInsert DXF link (Check units)Toposurface - Create from importCreate material using orthomosaic
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Mesh to Revit - OBJ/FBX to DXF
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PointCloud-DEM-Civil3d-Revit
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OutputClash detection/Modeling
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Output
OrthoplaneFacade
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Information SharingPotreeWeb basedOpen source
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Information SharingSketchfab
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Information SharingSketchfab
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Information SharingRECAP
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Information Sharing - A360RECAP
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Axoscape
Thank You!
Questions?
3.1. Photogrammetry for Site and Exterior/Interior Architecture
[email protected] Media Contact Details (if desired)