Datei:Ahaggar Landsat 8 pan sharpened composite.jpg
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Größe dieser Vorschau: 600 × 600 Pixel. Weitere Auflösungen: 240 × 240 Pixel | 480 × 480 Pixel | 768 × 768 Pixel | 1.024 × 1.024 Pixel | 2.048 × 2.048 Pixel | 8.751 × 8.751 Pixel
Originaldatei (8.751 × 8.751 Pixel, Dateigröße: 24,49 MB, MIME-Typ: image/jpeg)
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Version vom | Vorschaubild | Maße | Benutzer | Kommentar | |
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aktuell | 19:40, 19. Mär. 2021 | 8.751 × 8.751 (24,49 MB) | Linus Wolf | increase number of input rasters to 58 | |
06:03, 21. Dez. 2020 | 8.751 × 8.751 (24,49 MB) | Linus Wolf | increased number of input rasters to 54 | ||
14:18, 4. Aug. 2020 | 8.751 × 8.751 (24,37 MB) | Linus Wolf | increased number of input images to 49 while excluding a few; fixed a problem causing artefacts | ||
00:39, 14. Jul. 2020 | 8.721 × 8.721 (24,04 MB) | Linus Wolf | + 1 input raster; undid histogram matching (while fixing an error in weighted averaging), switched back to intensity-hue-saturation method for panchromatic sharpening, and changed scaling so that channels are not scaled separately | ||
18:35, 13. Apr. 2020 | 8.693 × 8.693 (25,35 MB) | Linus Wolf | discarded one more input raster with clouds, added several which seem good in the extent used for this image. Switched to Brovey reweighting for panchromatic sharpening. Added histogram matching between input rasters (the change in color is noticeable, I think). Fixed an issue of missing values not being excluded in averaging. | ||
20:25, 24. Dez. 2019 | 8.675 × 8.675 (23,67 MB) | Linus Wolf | added one new input raster; removed one which had clouds; set gamma correction to power 1.3 | ||
02:47, 5. Okt. 2019 | 8.654 × 8.654 (23,47 MB) | Linus Wolf | + 1 input raster | ||
03:34, 12. Mai 2019 | 8.610 × 8.610 (23,09 MB) | Linus Wolf | + 1 input raster; slight gamma correction | ||
03:16, 14. Apr. 2019 | 8.482 × 8.482 (22,35 MB) | Linus Wolf | {{Information |description ={{en|1=The Ahaggar, also known as the Hoggar, a volcanic mountain range in the central Sahara. The image is averaged from 32 Landsat 8-scenes, provided by NASA. Bands 4, 3, 2 and 8 were combined into an RGB image. Co-registration, weighted averaging, and rescaling to extrema of the scenes was done in R with the package [https://bleutner.github.io/RStoolbox/ RStoolbox]. JPEG-encoded with [https://github.... |
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