Canon POWERSHOT SD400 DIGITAL ELPH User Manual page 88

Stitch Assist can be used to shoot overlapping images that can later be
merged (stitched) to create one panoramic image on a computer.
1
The overlapping seams of
several adjacent images
can be joined into a single
panoramic image.
To merge the images on a computer, use PhotoStitch, one of the
supplied programs.
Framinga Subject
The PhotoStitch program detects the overlapping portions of adjoining
images and merges them. When shooting, try to include a distinctive item
(landmark) in the overlapping portions.
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Composeeach frame so that it overlaps30 - 50% of the adjoining image. Try
to keepthe vertical misalignment to lessthan 10% of the image height.
Do not include moving items in the overlap.
Do not try to stitch images that include both distant and close items.
These items may appear warped or doubled up in the merged image.
Make the brightness in each image consistent. The final image will appear
unnatural if the contrast in brightness is too great.
To shoot landscapes, swivel (pan) the camera around its own vertical axis.
To shoot close-ups, slide the cameraover the subject, keeping it parallel to
the subject asyou move it.