Re: get Subimage from ImagePlus

Posted by Bill Mohler on Oct 21, 2009; 4:53pm
URL: http://imagej.273.s1.nabble.com/get-Subimage-from-ImagePlus-tp3690681p3690684.html

Are the cropped-out pixels of the image automatically flushed from
memory when setProcessor(null,ip.crop()) is performed?

Also, can this be run on each slice of a virtual stack as it is called
up in an imageProcessor to be displayed?  In other words, can one
dynamically crop display of a VirtualStack without the data all being
loaded into memory?

Thanks,
Bill

Wayne Rasband wrote:

>  > Hello community
>  >
>  > I need to cut a subimage from an ImagePlus object. For
>  > example I have an ImagePlus object with the size 800X800
>  > and I need just a part of this image of the size 400X400.
>  >
>  > Is there a simple way to do this?
>
> Yes. Here is an example (in JavaScript):
>
>    imp = IJ.openImage("http://rsb.info.nih.gov/ij/images/ct.dcm.zip");
>    ip = imp.getProcessor();
>    ip.setRoi(233, 0, 400, 400);
>    imp.setProcessor(null, ip.crop());
>    imp.show();
>
> -wayne
>
>