This imagemagick script automatically positiones total solar eclipse corona images. This script is used by solarwind script.
Sample images are created using the default values of the script.
| Step 0 | Step 1 | Step 2 |
|---|---|---|
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| Original image | Grayscale | Auto-level |
| -colorspace gray | -auto-level |
|
| Step 3 | Step 4 | Step 5 |
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 |
 |
| Very bright | Two-color | Remove white dots |
| -modulate 5000 | +dither -colors 2 -contrast-stretch 0 |
-morphology Open Disk:2 |
| Step 6 | Step 7 | Step 8 |
 |
 |
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| Remove black dots | Add black border | Floodfill |
| -morphology Close Disk:30 | -bordercolor black -border 10x10 |
-fill white -floodfill +0+0 black |
| Step 9 | Step 10 | |
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 |
|
| Find black circle | Crop | |
| -trim -format "%X %Y %@" info: |
-crop |