Centroid estimation of grayscale image

[Florian]

Hello folks,

I am looking for a function that calculates the centroid (center of mass) of
a grayscale image/matrix with different algorithms.
Does anybody know one?

Thanks in advance, Greetings

Florian

[Daphne]

and if you have an earlier version of Matlab, check this
out
http://blogs.mathworks.com/steve/2007/08/31/intensity-
weighted-centroids/

Daphne

ImageAnalyst <imagea...@mailinator.com> wrote in
message <ec2ff76a-cfb0-4b30-a8be-
6677cf...@c58g2000hsc.googlegroups.com>...
> On May 26, 5:28=A0am, "Florian" <florian.m...@dlr.de>
wrote:

> > Hello folks,
> >
> > I am looking for a function that calculates the

centroid (center of mass) =

> of
> > a grayscale image/matrix with different algorithms.
> > Does anybody know one?
> >
> > Thanks in advance, Greetings
> >
> > Florian
>

> ---------------------------------------------------------
---------
> Florian:
> The regionprops() function in the image processing
toolbox does that
> (with R2008a & later only). What do you mean by "with
different
> algorithms"? I only know of the standard definition.
regionprops()
> does also have a non-weighted centroid that just depends
on the
> binarized image and disregards the gray levels in the
image, if you're
> looking for that.
> Regards,
> ImageAnalyst

[Florian]

Thanks for the answers. With different algorithms I mean different ways of
calculating the centroid, especially with subpixel accuracy. E.g. thers is
the center of mass calculation, the use of the Fourier transform of wavelet
transform. I heard that by using the wavelet transform the highest accuracy
is obtained.

Florian

"Daphne " <daphnew_t...@yahoo.com> schrieb im Newsbeitrag
news:g1f2sa$118$1...@fred.mathworks.com...