Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.
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Transcript of Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.
![Page 1: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/1.jpg)
Image Data Purchase and Pre-processing
Litia GaunavouSPC-SOPAC
![Page 2: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/2.jpg)
Pre-Processing
• Image Stitching
• Ortho-Correction
• Haze removal
• Atmospheric correction
• Pan-sharpening
![Page 3: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/3.jpg)
Image Stitching
Stitched Image
![Page 4: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/4.jpg)
Ortho Correction
• Ortho correction requires a DTM• the DTM should have similar scale
as image data
![Page 5: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/5.jpg)
New Satellites: GeoEye-1WorldView-1, WorldView-2
• High geo-accuracy ~ 5m1. Star tracker2. Advanced GPS position
• Ortho Correction required to activate high geo-accuracy
![Page 6: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/6.jpg)
Haze Removal
Raw LandSat 4 TM (Fiji – 1991) Haze Corrected LandSat 4 TM
![Page 7: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/7.jpg)
Atmospheric Correction
- View Angle
- DEM
- Sensor type
- Calibration data
- Sun angle
![Page 8: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/8.jpg)
Corrected Image
Raw ALOS Image (Fiji 2007) ALOS Image + atmospheric correction
![Page 9: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/9.jpg)
IHS Transformation
• Intensity• Hue• Saturation
• Intensity• Hue• Saturation
![Page 10: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/10.jpg)
IHS Transformation and Re-Transformation in ERDAS
Imagine
Red
Green
Blue
Intensity
Hue
Saturation
Red
Green
Blue
![Page 11: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/11.jpg)
Pan-Sharpening
Red
Green
Blue
PanchromaticImage Data
Intensity
Hue
Saturation Saturation
Hue
Normal Bands Pan-sharpened IMG
IHS Resolution Merge
Red
Green
Blue
Reso
lutio
n in
crease
![Page 12: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/12.jpg)
Casuarina
![Page 13: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/13.jpg)
Casuarina
Bands: 1, 2, 3, pan-sharpenednatural colour combination
![Page 14: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/14.jpg)
Casuarina
Bands: 2, 3, 4 pan-sharpenedfalse colour infrared
![Page 15: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/15.jpg)
Casuarina
Vegetation Index Bands: 4 – 3 / 4 + 3
![Page 16: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/16.jpg)
Radiometric Resolution
Coastal
YellowBlue
Red Edge
Green
Near IR 1
Red Near IR 2
![Page 17: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/17.jpg)
BND 2, 3, 5 Natural C
![Page 18: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/18.jpg)
BND 3, 5, 7 FCIR
![Page 19: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/19.jpg)
BND 3, 5, 6 FCIR RE
![Page 20: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/20.jpg)
BND 3, 5, 8 FCIR (IR2)
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Current WV-2 Bundle Data Backdrop Products:
• Pan-sharpened natural colour• Pan-sharpened false colour IR• Pan-sharpened false colour RE• Vegetation index red / near IR• Vegetation index red / RE
![Page 22: Image Data Purchase and Pre-processing Litia Gaunavou SPC-SOPAC.](https://reader034.fdocuments.us/reader034/viewer/2022042511/56649ef25503460f94c04942/html5/thumbnails/22.jpg)
Vinaka