Re: Saved image includes Pixel Inspection Tool marker

Posted by Herbie on Feb 13, 2020; 3:01pm
URL: http://imagej.273.s1.nabble.com/Saved-image-includes-Pixel-Inspection-Tool-marker-tp5022932p5022938.html

Lewis,

The problem is with the Pixel Inspection Tool not with ImageJ.

If the square were a selection, not an overlay, then no imprinting would
occur. So if you should really like to complain, you should address the
author.

In general the behavior of ImageJ to flatten images saved in JPG- or
PNG-format is perfectly ok and I judge it highly desirable.

Regards

Herbie

:::::::::::::::::::::::::::::::::::::::::::
Am 13.02.20 um 15:29 schrieb J. Lewis Muir:

> On 02/13, Herbie wrote:
>> I've just tested it (IJ-version 1.52t) and realized that the selected area
>> is in fact an overlay. When saving images with overlays in JPG- or
>> PNG-format, they are flattened, i.e. the overlay is imprinted onto the
>> image. This behavior isn't a bug.
>>
>> What you can do, if you don't like the red square being imprinted, is go to
>> "Image >> Overlay >> Remove Overlay".
>
> Hello, Herbie!
>
> Thank you for your reply!  I confirm that choosing Image > Overlay >
> Remove Overlay removes the red box, even with the Pixel Inspection Tool
> selected and results in a clean image without the red box when saved as
> PNG.
>
> I still feel that this is a bug, though.  If it's not a bug, then it's
> at least really surprising and confusing behavior, IMO.  All I did
> was create a new image and use the Pixel Selection Tool to inspect a
> pixel.  I never created an overlay or did anything with an overlay.  It
> is very unexpected to me that saving an image would result in an image
> containing the graphical cursor from an inspection tool I happened to
> use.  It would almost be like leaving my mouse cursor hovering over
> the image and then saving the image only to discover that the mouse
> cursor had been saved in the image as if I had taken a screenshot of the
> window.  I really don't see how this is reasonable behavior.
>
> Now, if I had instead chosen, e.g., the Text Tool, entered some text,
> and then had chosen Edit > Draw, then I could see this behavior as
> reasonable.  But for an inspection tool like the Pixel Inspection Tool,
> it just makes no sense that the cursor for the tool would be saved in
> the image.
>
> I had a look at the Magnifying Glass Tool to see if it has the same
> behavior as the Pixel Inspection Tool, and it does not.  I selected the
> Magnifying Glass Tool, zoomed in to 300%, and it displayed two purple
> boxes in the top-left corner.  I then chose File > Save As > PNG, and
> the resulting image does *not* include the purple boxes.  This seems
> entirely reasonable and is what I would expect.
>
> Thank you!
>
> Lewis
>
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