Thankyou Wayne. so as i understand the sobel operator is of course used in
the command Process->Find edges and the display is done by adding up the
sqaures of the two derivatives and then applying the square root on them.
But I fail to understand where and how possibly i could use this method in
the harris corner detector. i have to admit i am not an expert in image
analysis but it has been always the guidance from the list and my intend to
come out with a solution that has helped me out. I would be really glad to
have your suggestions.
thnks
don
On Wed, Jul 21, 2010 at 4:13 PM, Rasband, Wayne (NIH/NIMH) [E] <
[hidden email]> wrote:
> On Jul 21, 2010, at 9:48 AM, Donny George wrote:
>
> > Hello
> >
> > Over the past few weeks, I am have been working with the Harris Corner
> > Detector. Courtesy to Digital Image Processing by Wilhem Burger and his
> > guidance, along with the link
> >
> >
http://www.imagingbook.com/index.php?id=98> >
> > I have played with this plugin and modified it based on the type of
> images i
> > analyse. However i was trying to change the method of display of the
> harris
> > detector functionl. As of now the plugin harris detector displays the
> > corners as cross marks. I find that displaying it with the Process->Find
> > Edges(in built command within Imagej) seems an alternative. Though i
> tried
> > to figure the method used to display the result using this command I
> havent
> > met with any success lately. I understand that theres a sorting which is
> > done in the Harris detector but I am not sure which part of it the whole
> > method limits the cornerness values being taken into consideration. I am
> not
> > sure though. Would someone be in a better position to help me out with
> this
> > form of display for the edges in the image.
>
> Donny,
>
> The Find Edges command is described at
>
>
http://rsbweb.nih.gov/ij/docs/menus/process.html#find>
> The pixel values in the image are replaced by the filter output and the
> display is updated by calling ImagePlus.updateAndDraw().
>
> -wayne
>
>
>
>
>
>
>
--
Donny George
--
Donny George
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