advanced ortho image processing igic 2010. 2 advanced ortho image processing outline ■about surdex...
TRANSCRIPT
![Page 1: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/1.jpg)
AdvancedAdvancedOrtho Image ProcessingOrtho Image Processing
IGIC 2010IGIC 2010
![Page 2: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/2.jpg)
2
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Outline
■ About Surdex■ Digital Acquisition Trends■ Image Processing■ Image Processing Approach■ Questions and Answers
![Page 3: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/3.jpg)
3
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Surdex
■ Surdex headquartered in St. Louis, MO area■ Over a half-century of photogrammetric mapping
~100 employees7 aircraft – 4 Cessna 441 (Conquest) Turbine Aircraft3 Intergraph Digital Mapping Cameras (DMC)5 film camerasLiDAR
■ Very progressive R&DLarge amount of proprietary algorithms and softwareFocus on cost-efficiency and performance
![Page 4: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/4.jpg)
4
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Surdex’s Digital Camera
■ Own and operate 3 Intergraph DMCsDigital Mapping CameraOperated since summer, 2005
■ Large-format digital frame cameraSimultaneous capture of panchromatic, color, near infrared12 bits/pixel potential dynamic range500MB per exposure
■ >600,000 exposures processed
![Page 5: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/5.jpg)
5
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Multispectral Imagery (Minnesota NAIP, 2008)
![Page 6: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/6.jpg)
6
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Multispectral High-Resolution Imagery
![Page 7: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/7.jpg)
7
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
~3” Resolution (Ottawa, Canada, 2007)
![Page 8: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/8.jpg)
8
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Digital Imaging – From 4+ Miles Up
2’ DOQQ & Close-Up
![Page 9: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/9.jpg)
9
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Digital Acquisition Trends
■ Film digital faster than most “experts” imagined40+ large-format digital cameras in North AmericaDoubled in last 3 yearsNumerous companies have completely abandoned filmFilm suppliers reducing emulsion offerings
■ Trends Increasing demand for “4-band” (R,G,B,NIR) Increasing demand for stereo Increasingly aggressive schedules
■ Many operators have developed their own software
![Page 10: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/10.jpg)
10
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Image Processing for Results
■ What does the client want?Pretty picture?Support detailed GIS analysis?Match the last project?Hardcopy or softcopy?
■ Client must be involved in establishing “colorimetry”Color – easiest to establishContrast – affects brightness and sharpnessBrightness – interlocked with contrast
■ Digital imagery – “what color do you want?”
![Page 11: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/11.jpg)
11
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Resolutions & Flying Height
0.4’ (4,000’) 0.5’ (5,000’) 0.6’ (6,000’) 0.7’ (7,000’) 0.8’ (8,000’)20% low nominal 20% high 40% high 60% high
Actual Surdex DMC Test ImageryAll Exposures Taken Within ~1 Hour Timeframe
All Remapped to (target) 0.5’ GSD
![Page 12: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/12.jpg)
12
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Color Variation
Courtesy ITT Space Systems
![Page 13: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/13.jpg)
13
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Calibrated Monitors are a Must!
Courtesy ITT Space Systems
Actual Pictures of Same Image on Different Monitors!
![Page 14: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/14.jpg)
14
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Linear CCD response needs correction
Gamma(Logarithmic)
Correction
![Page 15: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/15.jpg)
15
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Processing of Digital Imagery
■ Use reference images from acquisitionWork with client to get the desired lookLock down “colorimetry” before production begins
■ Why?Client has ownership in what deliverables look likeLess alteration of the imagery in the last stepLess re-work, better performance (schedule)Reduces QC to accuracy and artifact scrutiny
![Page 16: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/16.jpg)
16
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Key Points
■ Technicians sort raw images into “groups”Geopositioned using ABGPS/IMUCommon scene characteristics1,000’s of images loaded at once
■ Enhancements are prototyped■ Batch-processing in distributed environment■ 12bpp processing – option to output to 8bpp■ 4-band processing to output color and CIR
![Page 17: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/17.jpg)
17
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Processing
■ Gamma correction Initial targeting of image metrics
■ Digital dodgingOffset atmospheric hazeOffset localized brightness/contrast variations
■ Solar correction (“hot spot” removal)Offset solar illumination (especially for high-altitude)Aided by sun ephemeris data and ABGPSAutomated with operator override
■ Full 12 bpp processingOption to output in 8 bpp at completion
![Page 18: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/18.jpg)
18
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Image Processing Flow Example (NAIP08)
1. Grouping of images2. Gamma correction3. Correct to color metrics
Dodging to remove local variations
Solar correction tooffset sun illumination
![Page 19: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/19.jpg)
19
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Uncorrected12-bit Raw Image
Image Processing Flow
![Page 20: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/20.jpg)
20
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Image Processing Flow
Initial Gamma Correction
![Page 21: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/21.jpg)
21
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Image Processing Flow
Solar Correction
![Page 22: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/22.jpg)
22
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Image Processing Flow
Digital Dodging
![Page 23: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/23.jpg)
23
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Pre-Production vs Final Product – “WYSIWYG”
![Page 24: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/24.jpg)
24
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Effectiveness of the Approach
■ NAIP 20096 states -- ~540,000 sq mi~100,000 exposures acquired @ ~34,000’ MSL~38,000 DOQQs @ 1m resolution X 4-bands5.5 months from acquisition through final delivery
■ Despite incremental product processing:Achieve overall state consistencyAchieve “national” consistency
■ The keys:Reference imagery processColorimetry established before production
![Page 25: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/25.jpg)
25
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
![Page 26: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/26.jpg)
26
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
![Page 27: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/27.jpg)
27
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Delivering Seamline Data
■ New deliverable to all clients■ Seamline polygons with attributes
Date/time of acquisitionCamera & aircraft IDsSize of polygon
■ Why?Provide guidance to client or 3rd party QC – most errors are
related to seamlinesProvide a date for each pixel – desired by some for historical
reasons
![Page 28: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/28.jpg)
28
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Common Seamline Error – and Resolution
![Page 29: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/29.jpg)
29
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Seamlines – Spokane, WA 2009
![Page 30: Advanced Ortho Image Processing IGIC 2010. 2 Advanced Ortho Image Processing Outline ■About Surdex ■Digital Acquisition Trends ■Image Processing ■Image](https://reader030.vdocuments.mx/reader030/viewer/2022033020/56649e925503460f94b981fc/html5/thumbnails/30.jpg)
30
Advanced Ortho Image ProcessingAdvanced Ortho Image Processing
Closing Comments
■ Clients and contractors must work together to establish colorimetry prior to productionNo surprises upon deliveryAssures scheduleReduces cost
■ Take advantage of the content of digital sensors12bpp == 8X more data than scanned film4-band (color + CIR)