"Milton" wrote in message <k5pr1s$22i$1@newscl01ah.mathworks.com>...
> I have 3D volumes of grayscale values that i can binarize by applying a threshold. I would like to find objects in that volume that are spherical, or nearly so. I'm hoping there is a way to use something like a circular Hough transform or imfindcircles, but in a 3D volume instead of a 2D image.
>
> There will be many non-spherical objects, mainly in a vaguely cylindrical shape. I am not too concerned about restricting the possible radius of the sphere.
>
> I don't see anything in the File Exchange, or built in to Matlab, that seems to do this.
>
> Any suggestions?
> Thanks,
> Milton
>
> PS if you're interested, this is an effort to find lung tumors in presence of background noise from vasculature in microCT data.
i also need to find spherical objects in a ct volume data and cant evaluate the circular Hough transform as i need. just make some research and find your post. did you solve your problem and can you give me some tips
best regards
> I have 3D volumes of grayscale values that i can binarize by applying a threshold. I would like to find objects in that volume that are spherical, or nearly so. I'm hoping there is a way to use something like a circular Hough transform or imfindcircles, but in a 3D volume instead of a 2D image.
>
> There will be many non-spherical objects, mainly in a vaguely cylindrical shape. I am not too concerned about restricting the possible radius of the sphere.
>
> I don't see anything in the File Exchange, or built in to Matlab, that seems to do this.
>
> Any suggestions?
> Thanks,
> Milton
>
> PS if you're interested, this is an effort to find lung tumors in presence of background noise from vasculature in microCT data.
i also need to find spherical objects in a ct volume data and cant evaluate the circular Hough transform as i need. just make some research and find your post. did you solve your problem and can you give me some tips
best regards