[Insight-users] to divide images

David Llanos gva02 at elai.upm.es
Thu, 29 Apr 2004 19:20:27 +0200


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Hi all,

I am looking for classes and methods to divide a binary image in several =
binary images, in function of the I number of objects that the original =
binary image has. For example, of the image binar.png, to obtain four =
images like uno.jpg.
I have gotten the first requirement for this objective that is to label =
this objects, by means of the following code:
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
------------
                    .....
 xorfilter->SetInput1( grindpeak->GetOutput() );
 xorfilter->SetInput2( binaryDilate->GetOutput() );
 imgEsperBWsin->SetInput( xorfilter->GetOutput() );
 imgEsperBWsin->Update();
 std::cout << "Numero de iteraciones: " << =
grindpeak->GetNumberOfIterationsUsed() << "  .....bordes borrados" << =
std::endl;
    std::cout << "Imagen imgEsperBWsin.jpg creada... " << std::endl;

// Etiquetado de la imagen
 itkConnectedComponentFilterType::Pointer labeller =3D=20
  itkConnectedComponentFilterType::New();
 labeller->SetInput( xorfilter->GetOutput() );
 labeller->Update();

unsigned long nObjects =3D relabeller->GetNumberOfObjects();
 const std::vector<unsigned long> sizeOfObjects =3D =
relabeller->GetSizeOfObjectsInPixels();
 std::cout << "Number of objects : " << nObjects << std::endl;
 std::vector<unsigned long>::const_iterator it;
 int i; =20
 for(i =3D 0, it =3D  sizeOfObjects.begin(); it !=3D =
sizeOfObjects.end(); ++i, ++it) {=20
  std::cout << "Size of object " << i+1 << ": " << (*it) << " pixels" << =
std::endl;
 }
-------------------------------------------------------------------------=
-------------------------------------

I have been looking for some relabeller or labeller method  (in =
http://www.itk.org/Insight/Doxygen/html/classitk_1_1RelabelComponentImage=
Filter-members.html and in =
http://www.itk.org/Insight/Doxygen/html/classitk_1_1ConnectedComponentIma=
geFilter-members.html) to go keeping the different objects of the image =
in pointers, either to write files or to work with them for separate, =
but I have not found anything with that that to be able to work.
does some form exist of using these classes for my objective, or do I =
have to use another class? In that case, What relabeller or labeller =
method  can I use to relate an object labeled with another class?=20

Thanks inadvange and regards,

David.



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<DIV><FONT face=3DArial size=3D2>Hi all,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I am looking for classes and methods to =
divide a=20
binary image in several binary images, in function of the I number of =
objects=20
that the original binary image has. For example, of the image binar.png, =
to=20
obtain four images like uno.jpg.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I have gotten the first requirement for =
this=20
objective that is to label this objects, by means of the following=20
code:</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>----------------------------------------------------------------=
-------------------------------------------------------------------------=
---------------------</FONT></DIV>
<DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;=20
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; =
.....</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;xorfilter-&gt;SetInput1(=20
grindpeak-&gt;GetOutput() );<BR>&nbsp;xorfilter-&gt;SetInput2(=20
binaryDilate-&gt;GetOutput() );<BR>&nbsp;imgEsperBWsin-&gt;SetInput(=20
xorfilter-&gt;GetOutput() =
);<BR>&nbsp;imgEsperBWsin-&gt;Update();</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;std::cout &lt;&lt; "Numero de =
iteraciones: "=20
&lt;&lt; grindpeak-&gt;GetNumberOfIterationsUsed() &lt;&lt; "&nbsp; =
.....bordes=20
borrados" &lt;&lt; std::endl;<BR>&nbsp;&nbsp;&nbsp; std::cout &lt;&lt; =
"Imagen=20
imgEsperBWsin.jpg creada... " &lt;&lt; std::endl;</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>//&nbsp;Etiquetado de la=20
imagen<BR>&nbsp;itkConnectedComponentFilterType::Pointer labeller =3D=20
<BR>&nbsp;&nbsp;itkConnectedComponentFilterType::New();<BR>&nbsp;labeller=
-&gt;SetInput(=20
xorfilter-&gt;GetOutput() =
);<BR>&nbsp;labeller-&gt;Update();</FONT></DIV>
<DIV><FONT face=3DArial size=3D2><BR>unsigned long nObjects =3D=20
relabeller-&gt;GetNumberOfObjects();<BR>&nbsp;const =
std::vector&lt;unsigned=20
long&gt; sizeOfObjects =3D =
relabeller-&gt;GetSizeOfObjectsInPixels();</DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;std::cout &lt;&lt; "Number of =
objects : "=20
&lt;&lt; nObjects &lt;&lt; std::endl;<BR>&nbsp;std::vector&lt;unsigned=20
long&gt;::const_iterator it;<BR>&nbsp;int i;&nbsp;&nbsp;<BR>&nbsp;for(i =
=3D 0, it=20
=3D&nbsp; sizeOfObjects.begin(); it !=3D sizeOfObjects.end(); ++i,=20
++it)&nbsp;{&nbsp;<BR>&nbsp;&nbsp;std::cout &lt;&lt; "Size of object " =
&lt;&lt;=20
i+1 &lt;&lt; ": " &lt;&lt; (*it) &lt;&lt; " pixels" &lt;&lt;=20
std::endl;<BR>&nbsp;}</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>----------------------------------------------------------------=
----------------------------------------------</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV>I have been looking for some relabeller or labeller method&nbsp; =
(in <A=20
href=3D"http://www.itk.org/Insight/Doxygen/html/classitk_1_1RelabelCompon=
entImageFilter-members.html">http://www.itk.org/Insight/Doxygen/html/clas=
sitk_1_1RelabelComponentImageFilter-members.html</A>=20
and in <A=20
href=3D"http://www.itk.org/Insight/Doxygen/html/classitk_1_1ConnectedComp=
onentImageFilter-members.html">http://www.itk.org/Insight/Doxygen/html/cl=
assitk_1_1ConnectedComponentImageFilter-members.html</A>)=20
to go keeping the different objects of the image in pointers, either to =
write=20
files or to work with them for separate, but I have not found anything =
with that=20
that to be able to work.</DIV>
<DIV>does some form exist of using these classes for my objective, or do =
I have=20
to use another class? In that case, What relabeller or labeller =
method&nbsp; can=20
I use to relate an object labeled with another class? </DIV>
<DIV>&nbsp;</DIV>
<DIV>Thanks inadvange and regards,</DIV>
<DIV>&nbsp;</DIV>
<DIV>David.</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV></FONT></DIV></BODY></HTML>

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