Re: Object dimension measurement through image processing
- From: roberson@xxxxxxxxxxxxxxxxxx (Walter Roberson)
- Date: Tue, 24 Jun 2008 15:56:57 +0000 (UTC)
In article <g3r2b6$4u4$1@xxxxxxxxxxxxxxxxxx>,
David <dave@xxxxxxxxxxxxxx> wrote:
"Frederick " <fdegrano@xxxxxxx> wrote in message
<g3r0sa$es3$1@xxxxxxxxxxxxxxxxxx>...
Say I want to be able to take an image of a fairly simplethe
object, for example an I-beam, and develop a code using
image processing toolbox to be able to automaticallyand if
determine the dimensions of the object such as length,
width, and thickness. Do you think this is possible,
so, how should I go about doing this?
from a single image, no. Not without some other
information to provide scaling and orientation.
Quite right. You can't tell size if you don't know if the
picture is of a carbon microtube taken through a microscope,
or is the Rigid Tool (University of Waterloo Engineering mascot.)
If you
have a known geometry and camera calibration factors then
it becomes a 'simple' process of edge detection, object
identification, and just counting pixels from feature to
feature.
I think you might have accidently omitted perspective correction
from that list.
--
"Style is instinctive and few achieve it in a notable degree. Its
development is not hastened by instruction. It comes or it doesn't.
It will take care of itself." -- Walter J. Phillips
.
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