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Image Data Pre-processing for Pacific Island Countries

Image Data Pre-processing for Pacific Island Countries. Litia Gaunavou. Pre-Processing. Image Mosaicing Haze removal Atmospheric correction Pan-sharpening Ortho-Correction. Image Stitching. Stitched Image. Image Tiles. Haze Removal. Raw LandSat 4 TM (Fiji – 1991).

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Image Data Pre-processing for Pacific Island Countries

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  1. Image Data Pre-processingfor Pacific Island Countries LitiaGaunavou

  2. Pre-Processing • Image Mosaicing • Haze removal • Atmospheric correction • Pan-sharpening • Ortho-Correction

  3. Image Stitching Stitched Image Image Tiles

  4. Haze Removal Raw LandSat 4 TM (Fiji – 1991) Haze Corrected LandSat 4 TM

  5. Atmospheric Correction • View Angle • DEM • Sensor type • Calibration data • Sun angle

  6. Corrected Image Raw ALOS Image (Fiji 2007) ALOS Image + atmospheric correction

  7. Green, Red, Near Infrared

  8. Pan-Sharpening IHS Resolution Merge Panchromatic Image Data Red Intensity Red Green Hue Hue Green Saturation Saturation Blue Blue Multi-spectral IMG Pan-sharpened IMG

  9. Pan-Sharpening HypersphericalColor Space Resolution Merge WorldView-2 PAN data WorldView-2: MS Data

  10. Result Pansharpen_123 Pansharpen_234

  11. Reasons for Bundle • PanSharpen Natural Colour • PanSharpen False Colour Infrared • Multispectral available for Vegetation Index • ATCOR can be performed • Orthorectification can be performed

  12. New Satellites, GeoEye-1 & WorldView-2 • High geo-accuracy ~ 5m • Star tracker • Advanced GPS position • Ortho Correction required to activate high geo-accuracy

  13. Ortho Correction • Orthocorrection requires a DTM • the DTM should have similar scale as image data

  14. Vinaka!

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