Thread Subject: Canny Edge detection for 3D

Can Canny edge detection method be used for 3 dimensional images?

"Mukeshwar " <mdhamala@gsu.edu> wrote in message <i6ttqr$1rs$1@fred.mathworks.com>...
> Can Canny edge detection method be used for 3 dimensional images?

I am facing a similar problem, I have these CT scan images with multiple 2D slices across a certain volume of the human anatomy. I have applied the 2D filters to detect the edges, especially Canny, however in order to find the edges in the z-direction, no quick solution was found. So I am currently working towards modifying the canny filter to be able to find 3D edges. Anyone out there who has already done this??

"Avinash Gautam" <google_avimn@yahoo.com> wrote in message <i82ls2$8ac$1@fred.mathworks.com>...
> "Mukeshwar " <mdhamala@gsu.edu> wrote in message <i6ttqr$1rs$1@fred.mathworks.com>...
> > Can Canny edge detection method be used for 3 dimensional images?
>
> I am facing a similar problem, I have these CT scan images with multiple 2D slices across a certain volume of the human anatomy. I have applied the 2D filters to detect the edges, especially Canny, however in order to find the edges in the z-direction, no quick solution was found. So I am currently working towards modifying the canny filter to be able to find 3D edges. Anyone out there who has already done this??

Perhaps you could post your image volumes somewhere (http://drop.io) so we can run our private code on them.

Another quick idea is that you could permute you image volume to so that the z-direction is no longer the z-direction and use a 2-d filter on that.

On Sep 30, 3:03 pm, "Sean "
<sean.dewol...@nospamplease.umit.maine.edu> wrote:
> "Avinash  Gautam" <google_av...@yahoo.com> wrote in message <i82ls2$8a...@fred.mathworks.com>...
>
> > "Mukeshwar " <mdham...@gsu.edu> wrote in message <i6ttqr$1r...@fred.mathworks.com>...
> > > Can Canny edge detection method be used for 3 dimensional images?
>
> > I am facing a similar problem, I have these CT scan images with multiple 2D slices across a certain volume of the human anatomy. I have applied the 2D filters to detect the edges, especially Canny, however in order to find the edges in the z-direction, no quick solution was found. So I am currently working towards modifying the canny filter to be able to find 3D edges. Anyone out there who has already done this??
>
> Perhaps you could post your image volumes somewhere (http://drop.io) so we can run our private code on them.
>
> Another quick idea is that you could permute you image volume to so that the z-direction is no longer the z-direction and use a 2-d filter on that.

Thanks for the idea, however by permutating wouldnt you be repeating
one of the axis. If initially only xy edges were detected then,
rotating the volume would enable detection of z axis. However it would
also detect either x or y axis depending on your rotation.

"Mukeshwar " <mdhamala@gsu.edu> wrote in message <i6ttqr$1rs$1@fred.mathworks.com>...
> Can Canny edge detection method be used for 3 dimensional images?

I have the same question: can Canny edge detection method be used for 3 dimensional images? or any other edge detection methods for 3D? I have the same problem as mentioned in this post for CT images.

Thank you,
Shahab