ImageJ : SIFT and MOPS

[azizia abdullah]

Dear All,

I am using imageJ to analyze natural images. In this case, I am using SIFT and MOPS (http://pacific.mpi-cbg.de/wiki/index.php/Feature_Extraction) packages for automatic feature extraction and object detection. Both of them are based on finding salient regions of points in an image. Does anybody knows where I can download the SIFT and MOPS source codes. Or does anybody has implemented these techniques on a dense grid of uniformly spaced cells or overlapping grids.

best regards
azizisya.

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[Stephan Saalfeld]

Dear Azizisya,

the source code is GPL with the exception of SIFT since the UBC holds a
patent on this.  You find it in the Fiji git-repositories:

http://pacific.mpi-cbg.de/cgi-bin/gitweb.cgi?p=mpicbg.git;a=summary

I am curious what you have in mind doing with it.

Best regards,
Stephan


On Mon, 2008-10-20 at 04:41 -0700, azizia abdullah wrote:

> Dear All,
>
> I am using imageJ to analyze natural images. In this case, I am using
> SIFT and MOPS
> (http://pacific.mpi-cbg.de/wiki/index.php/Feature_Extraction) packages
> for automatic feature extraction and object detection. Both of them
> are based on finding salient regions of points in an image. Does
> anybody knows where I can download the SIFT and MOPS source codes. Or
> does anybody has implemented these techniques on a dense grid of
> uniformly spaced cells or overlapping grids.
>
> best regards
> azizisya.
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com 

[Xin ZHOU]

Hello, Stephan,

I'm using SIFT plugin.

I've got a question concerning about the SIFT plugin.
Actually I'm working on Fracture images and my main goal is to detect
fracture in bone.
My problem is that the points found don't correspond exactly to what I
want, which is : edges and where there's high changes in gradients.

I've changed the "MAX_CURVATURE" in FloatArray2DScaleOctaveDoGDetector.java.
I increased from 10 to 100. It works better but not perfect.

Do you have any idea how to better detect those edge points as well?

cheers, Xin

Stephan Saalfeld a écrit :

> Dear Azizisya,
>
> the source code is GPL with the exception of SIFT since the UBC holds a
> patent on this.  You find it in the Fiji git-repositories:
>
> http://pacific.mpi-cbg.de/cgi-bin/gitweb.cgi?p=mpicbg.git;a=summary
>
> I am curious what you have in mind doing with it.
>
> Best regards,
> Stephan
>
>
> On Mon, 2008-10-20 at 04:41 -0700, azizia abdullah wrote:
>  
>> Dear All,
>>
>> I am using imageJ to analyze natural images. In this case, I am using
>> SIFT and MOPS
>> (http://pacific.mpi-cbg.de/wiki/index.php/Feature_Extraction) packages
>> for automatic feature extraction and object detection. Both of them
>> are based on finding salient regions of points in an image. Does
>> anybody knows where I can download the SIFT and MOPS source codes. Or
>> does anybody has implemented these techniques on a dense grid of
>> uniformly spaced cells or overlapping grids.
>>
>> best regards
>> azizisya.
>>
>> __________________________________________________
>> Do You Yahoo!?
>> Tired of spam?  Yahoo! Mail has the best spam protection around
>> http://mail.yahoo.com 
>>    
>
>  

[Stephan Saalfeld]

Dear Xin,

The DoG detector detects blobs which includes junctions.  This regards
the bare image intensities only and might totally differ from what you
expect to be a junction or blob.  I doubt that the DoG detector is an
appropriate thing for detecting fractures in bones (I assume you're
talking about X-ray images?).  Actually, I don't see how DoG detections
or SIFT features would help you in this field, but may be this is
because I have totally no idea about how your images look like.

Assuming that it is X-ray and that you know something about the angle of
projection and the imaged bones it could eventually help to have a look
at scale-invariant edge and ridge detection as described by Lindeberg

ftp://ftp.nada.kth.se/CVAP/reports/cvap191.pdf

Sorry for not being able to deliver a fast "do-it-so" answer.

Best regards,
Stephan


On Mon, 2008-10-20 at 21:50 +0200, Xin ZHOU wrote:

> Hello, Stephan,
>
> I'm using SIFT plugin.
>
> I've got a question concerning about the SIFT plugin.
> Actually I'm working on Fracture images and my main goal is to detect
> fracture in bone.
> My problem is that the points found don't correspond exactly to what I
> want, which is : edges and where there's high changes in gradients.
>
> I've changed the "MAX_CURVATURE" in FloatArray2DScaleOctaveDoGDetector.java.
> I increased from 10 to 100. It works better but not perfect.
>
> Do you have any idea how to better detect those edge points as well?
>
> cheers, Xin
>
> Stephan Saalfeld a écrit :
> > Dear Azizisya,
> >
> > the source code is GPL with the exception of SIFT since the UBC holds a
> > patent on this.  You find it in the Fiji git-repositories:
> >
> > http://pacific.mpi-cbg.de/cgi-bin/gitweb.cgi?p=mpicbg.git;a=summary
> >
> > I am curious what you have in mind doing with it.
> >
> > Best regards,
> > Stephan
> >
> >
> > On Mon, 2008-10-20 at 04:41 -0700, azizia abdullah wrote:
> >  
> >> Dear All,
> >>
> >> I am using imageJ to analyze natural images. In this case, I am using
> >> SIFT and MOPS
> >> (http://pacific.mpi-cbg.de/wiki/index.php/Feature_Extraction) packages
> >> for automatic feature extraction and object detection. Both of them
> >> are based on finding salient regions of points in an image. Does
> >> anybody knows where I can download the SIFT and MOPS source codes. Or
> >> does anybody has implemented these techniques on a dense grid of
> >> uniformly spaced cells or overlapping grids.
> >>
> >> best regards
> >> azizisya.
> >>
> >> __________________________________________________
> >> Do You Yahoo!?
> >> Tired of spam?  Yahoo! Mail has the best spam protection around
> >> http://mail.yahoo.com 
> >>    
> >
> >  
>