Subject:
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Re: Working motorized focus for Vision Command
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 19 Dec 2002 03:29:34 GMT
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Original-From:
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Steve Baker <sjbaker1@airmailSPAMLESS.net>
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Viewed:
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1283 times
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Andy Miller wrote:
> One source of inspiration for the focusing algorithm is to look at codes
> that expand the depth of focus by stitching together the in-focus portions
> of multiple images. This is used in microscopy quite a bit. The software has
> to be able to identify which portions of the picture are in-focus. Here is a
> link to a description of the technique: http://www.sgi.com/grafica/depth/.
> One of the steps is to detect edges. ImageMagick will do that
> http://www.imagemagick.org.
That sounds like a great idea - by driving the Lego focus all the way
from one end to another taking pictures as you go, and selecting
the best parts of each, you'd end up with better-than-perfect focussing.
I guess you'd want to be careful to mount the camera very rigidly
so it doesn't wobble as you drive the focussing ring.
Also, it would be a dismal failure for moving images.
---------------------------- Steve Baker -------------------------
HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com>
HomePage : http://web2.airmail.net/sjbaker1
Projects : http://plib.sf.net http://tuxaqfh.sf.net
http://tuxkart.sf.net http://prettypoly.sf.net
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Message has 1 Reply:
 | | Re: Working motorized focus for Vision Command
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| (...) That would sure help make the image processing faster, but techniques do exist for image registration (e.g. (URL) This is often required for MRI or electron microsope images since the movement of the apparatus affects the image scale, skew and (...) (22 years ago, 19-Dec-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Working motorized focus for Vision Command
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| (...) Timothy, One source of inspiration for the focusing algorithm is to look at codes that expand the depth of focus by stitching together the in-focus portions of multiple images. This is used in microscopy quite a bit. The software has to be (...) (22 years ago, 18-Dec-02, to lugnet.robotics)
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