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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 up previous contents
Next: 5.10 New Up: 5. Image processing menus Previous: 5.8 Morphology   Contents
John Cupitt 2003-07-21