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Science Forum Index » Image Processing Forum » multiple regions and their rectangular boundaries...
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| AT... |
 Posted: Tue May 20, 2008 11:37 am |
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Guest
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Hello everybody,
I have an image (background and some unknown objects of unknown
shapes), which should be segmented, and it should be found rectangular
boundaries for all multiple regions (segments) .
I don't really know, if term "rectangular boundaries" is correct.
Are there some methods / algorithms for this goal? Could somebody give
me an advice or link or book titles.
Thanks a lot,
Tim |
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| ImageAnalyst... |
| Posted: Wed May 21, 2008 5:42 pm |
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Guest
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On May 20, 5:37 pm, AT <tiktak... at (no spam) genion.de> wrote:
Quote: Hello everybody,
I have an image (background and some unknown objects of unknown
shapes), which should be segmented, and it should be found rectangular
boundaries for all multiple regions (segments) .
I don't really know, if term "rectangular boundaries" is correct.
Are there some methods / algorithms for this goal? Could somebody give
me an advice or link or book titles.
Thanks a lot,
Tim
----------------------------------------------
Tim:
It's usually called the "Bounding Box." You just find your object's
pixels, or even the boundaries, (i.e. their x,y coordinates) and find
the minimum and maximum x and min and max y and that will give you the
bounding box. Pretty simple. A more complicated concept is the
convex hull, which is like if you wrapped a rubber band around your
shape. An even more complex boundary is the concept of "alpha
shapes," which is sort of like the convex hull but can be concave as
well as convex and has a parameter that says how closely it hugs your
actual boundary.
Regards,
ImageAnalyst |
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