zoom image

[rickyxiangzhihai]

Hi, I am new to Imagej Api, I am trying to zoom in a image in display, but
the image stays the same.
I have tried IJ.runPlugIn("ij.plugin.Zoom", "in"), which works, but I want
to stick to IJ2.
I tried two ways of doing it. one is use ZoomService, another is to use
command. here is my code.

                final ImageJ ij = new ImageJ();
                final Dataset dataset =
ij.scifio().datasetIO().open("0050000006\\dcm\\0000001.dcm");
                ij.launch(args);
                final ImageDisplay imageDisplay =
                                (ImageDisplay) ij.display().createDisplay(dataset);

                Context context = new Context(DefaultZoomService.class);
                ZoomService zoomService = context.getService(DefaultZoomService.class);
                zoomService.zoomIn(imageDisplay);
                CommandInfo info =
ij.command().getCommand("net.imagej.plugins.commands.zoom.ZoomIn");
                ij.command().run(info, true);


neither work. Please tell me the standard way of doing it. TY



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[Curtis Rueden-2]

Hi,

Apologies for the delay in reply. There are a couple of issues with your
code:

> Context context = new Context(DefaultZoomService.class);

Do not make a new Context. Use the one you already have—it's inside the
ImageJ object.

  Context context = ij.context();

> ZoomService zoomService = context.getService(DefaultZoomService.class);

Do not ask for a service by concrete implementation. Just use the interface:

  ZoomService zoomService = context.service(ZoomService.class);

But adjusting both of those things is still unlikely to fix your issue,
because the legacy ImageJ user interface is built on ImageJ1, and it's only
partially integrated into the ImageJ2 API. So I fear the pure-ImageJ2
approach you are trying to use is doomed to failure at the moment. You need
either: A) stick with IJ.runPlugIn("ij.plugin.Zoom", "in"); or B) switch to
the Swing UI of ImageJ2. I'd recommend (A) for now, since we don't
currently have bandwidth to actively work on or support ImageJ2's Swing UI.

Regards,
Curtis

P.S. Questions about ImageJ2 are best posted on forum.image.sc with the
imagej tag, rather than here on the ImageJ(1) mailing list.

--
Curtis Rueden
Software architect, LOCI/Eliceiri lab - https://loci.wisc.edu/software
ImageJ2 lead, Fiji maintainer - https://imagej.net/User:Rueden
Have you tried the Image.sc Forum? https://forum.image.sc/



On Tue, Feb 4, 2020 at 6:43 PM rickyxiangzhihai <[hidden email]>
wrote:

> Hi, I am new to Imagej Api, I am trying to zoom in a image in display, but
> the image stays the same.
> I have tried IJ.runPlugIn("ij.plugin.Zoom", "in"), which works, but I want
> to stick to IJ2.
> I tried two ways of doing it. one is use ZoomService, another is to use
> command. here is my code.
>
>                 final ImageJ ij = new ImageJ();
>                 final Dataset dataset =
> ij.scifio().datasetIO().open("0050000006\\dcm\\0000001.dcm");
>                 ij.launch(args);
>                 final ImageDisplay imageDisplay =
>                                 (ImageDisplay)
> ij.display().createDisplay(dataset);
>
>                 Context context = new Context(DefaultZoomService.class);
>                 ZoomService zoomService =
> context.getService(DefaultZoomService.class);
>                 zoomService.zoomIn(imageDisplay);
>                 CommandInfo info =
> ij.command().getCommand("net.imagej.plugins.commands.zoom.ZoomIn");
>                 ij.command().run(info, true);
>
>
> neither work. Please tell me the standard way of doing it. TY
>
>
>
> --
> Sent from: http://imagej.1557.x6.nabble.com/
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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