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5.9 Mosaic
The items in this menu are discussed in appalling detail in
Chapter 3.
- Mosaic_translate
- Join two images left-right or top-bottom with a simple
translation. Mark a point on each image to be joined (open image
view window, Ctrl-left-click, drag to position), then click on the
mosaic button. Open the row to adjust the join parameters. The
operation performs elaborate tie-point adjustment, so your selection
of a common feature does not have to be exact.
- Mosaic_force
- Like translate, but force the two images together with no tie-point
optimisation.
- Mosaic_affine
- Do a join, but allow the right-hand (or bottom) image to rotate and
scale if it will improve the match. You need to pick two points on
each image.
- Mosaic_balance
- Break a mosaic apart, examine average pixel value in the overlap
regions, adjust brightness to match, and reassemble. This only works
for images which have been produced just by mosaic joins! If you've
done anything else to the image since loading it, the balance will
fail with a mysterious message.
- Tilt_brightness
- Handy for removing left-right or top-bottom graduations in brightness.
These often occur after a mosaic balance. Apply to an image, then open
the row to adjust the parameters.
- Mosaic_rebuild
- Use this to mosaic up one set of files based on joins you made
in another. Breaks a mosaic part to component files, performs a
string substitution on the file names, and reassembles. Open the
row to adjust the string substitutions performed.
Next: 5.10 New
Up: 5. Image processing menus
Previous: 5.8 Morphology
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John Cupitt
2003-07-21