Posted by
Michael Schmid on
Aug 19, 2016; 4:37pm
URL: http://imagej.273.s1.nabble.com/Saving-the-ROI-in-JPEG-tp5017084p5017088.html
Hi Madhoosudan,
if you save an image as PNG or JPG, ImageJ puts overlays into the image
data. You can then see these overlays in any image viewer, but you
cannot recover the original image behind them.
Use Image>Overlay>Add Selection to convert a ROI into an overlay.
For multiple ROIs in the ROI Manager, you can use Image>Overlay>From ROI
Manager.
JPG has the disadvantage that it is a lossy compression; especially the
1-pixel wide ROI boundaries often look awful. Better use PNG.
If you save an image as TIFF, ImageJ saves the ROI boundaries and
overlays into private fields of the TIFF file, and the image data remain
unchanged. If you have the ROI manager open, with several ROIs visible,
ImageJ stores all of them (e.g. for later analysis).
There is no general standard how to save ROIs in a TIFF file, so there
is no way to make the ROIs accessible as ROIs to other software.
Also, other software would not support all ROI types of ImageJ.
The advantage of the TIFF format is that it preserves the original image
data (and ROIS, overlays, metadata...) for further analysis in ImageJ.
Michael
________________________________________________________________
On 2016-08-19 17:24, madhoosudan patil wrote:
> Hi I am working on the image where I am assigning the efferent ROI to
> measure it. After I am done with this I want to save the image along with
> selected ROI which can be opened in any image viewing application. I tried
> saving the image as tiff. But in that case I can only see the ROI if I
> reopen the image in ImageJ but not in any other default widows applications.
>
> --
>
> Regards,
>
>
> Madhoosudan Patil,
> Post Doctoral Fellow,
> Skaggs School of Pharmacy,
>
> Anschutz Medical Campus,
> University of Colorado, Denver, USA.
> Ph.: 001 (720) 975-4360
> E-Mail:
[hidden email]
>
> --
> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>
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