Image stitching
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Image stitching or photo stitching is the process of combining multiple images to produce a panorama or larger image. Computer software is often used to interpolate the final image where the component images are not in precise alignment. This is usually done in three stages. First the computer analyzes the translation and rotation between any two sequencing images (for example via Lucas Kanade method). Then the computer stabilizes the images so that every two images differentiate from each other only in their horizontal component. In the last stage a panorama image is stitched from the images. The stitching can be done by combining strips from each image.
Most methods require that the images have all been taken from the same point in space; they are then arranged into a typically spherical projection by matching the edges of the images to each other.
Often the adjoining areas of the component images are matched for color, contrast and brightness to avoid the stitched parts being easily noticeable due to otherwise easily visible variations between the images.
Example programs include Hugin, Ptgui, Panorama Tools, Photostitch, and CleVR.
Many other programs today include features which allow an easy way to stitch together multiple images. One such example is Adobe Photoshop, which includes a tool known as "Photomerge" and the new "Auto-Blend" in CS3. Also, Photoshop has a "Nudge" option, which makes it easy to manually stich two pictures together if there's enough contrast along their edges. There are many stand alone programs for stitching together multiple images.
[edit] See also
[edit] External links
- Photo Stitching Digital Panoramas - Illustrated overview on how to create stitched photographs with an ordinary digital camera
- Stitching with hardware - 13 routes to mechanical shift movements for DSLRsde:Stitching
