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Dear friends
When using imageJ to crop a 3D reconstructed images(stacks), basically you select a ROI and then go crop it and save all the sequences. Now, my cortical bone sample scanned is just a cylinder with 3 mm in diameter and 12 in length. To get rid of the cupping effect , I would just like to crop a sub-cylinder of the original reconstructions. It seems in imageJ whenever you choose a ROI like a circle and crop it , you acually get images of circumscribed rectangle of the circle you drew, rather than the sub-circle of the images and fill the other part of the images with say black background. Is there any way to do it ? Much appreciated ! Yuan Chen University of Sheffield -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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On Wednesday 04 Sep 2013 21:23:31 Yuan Chen wrote:
> imageJ whenever you choose a ROI like a circle and crop it , you acually > get images of circumscribed rectangle of the circle you drew, rather than > the sub-circle of the images and fill the other part of the images with say > black background. > > Is there any way to do it ? Edit>Clear_outside command? -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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On Wednesday, September 04, 2013 4:03 PM Gabriel Landini wrote: >>On Wednesday 04 Sep 2013 21:23:31 Yuan Chen wrote: >> imageJ whenever you choose a ROI like a circle and crop it , you acually >> get images of circumscribed rectangle of the circle you drew, rather than >> the sub-circle of the images and fill the other part of the images with say >> black background. >> >> Is there any way to do it ? > Edit>Clear_outside command? Yes, but first make sure in Edit -> Options -> Colors your background is set to black. I think this is default, but better safe than sorry. -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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In reply to this post by Gabriel Landini
thanks very much Gabriel!
Best Yuan On 4 September 2013 22:03, Gabriel Landini <[hidden email]> wrote: > On Wednesday 04 Sep 2013 21:23:31 Yuan Chen wrote: > > imageJ whenever you choose a ROI like a circle and crop it , you acually > > get images of circumscribed rectangle of the circle you drew, rather than > > the sub-circle of the images and fill the other part of the images with > say > > black background. > > > > Is there any way to do it ? > > Edit>Clear_outside command? > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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In reply to this post by Christine Labno-2
Yes, this is it. I solved this , thank you Christine!
Best Yuan On 4 September 2013 22:11, Christine Labno <[hidden email]> wrote: > > > On Wednesday, September 04, 2013 4:03 PM Gabriel Landini wrote: > > >>On Wednesday 04 Sep 2013 21:23:31 Yuan Chen wrote: > >> imageJ whenever you choose a ROI like a circle and crop it , you acually > >> get images of circumscribed rectangle of the circle you drew, rather > than > >> the sub-circle of the images and fill the other part of the images with > say > >> black background. > >> > >> Is there any way to do it ? > > > Edit>Clear_outside command? > > Yes, but first make sure in Edit -> Options -> Colors your background is > set to black. I think this is default, but better safe than sorry. > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > > > > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > ... [show rest of quote] -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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When we are cropping image, we are supposed to select a ROI and then go crop it and save all the sequences. After cropping an area, we can conduct some basic editing applications toward cropped image. For example, we can adjust the size of created cropped image file, add antique effect to cropped image and rotate the orientation of cropped image.
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