Re: makeOval()'s surprising behavior

Posted by Neil Fazel on Oct 13, 2014; 12:03am
URL: http://imagej.273.s1.nabble.com/makeOval-s-surprising-behavior-tp5009996p5010004.html

Hi Michael,

   Thanks a lot for the response.

> What you probably refer to is ADDING an oval to a selection

Yes, I should have also added that I used setKeyDown("shift") before adding the oval.

> However, note that it only affects how the selections are displayed, not how they are used by the program.

Is there a reason for displaying composite and non-composite selections differently?

This paragraph, from section 10.3 of ImageJ 1.46r user guide, suggests that selections with subpixel resolution also have floating point coordinates:

"Since ImageJ 1.46, selections can be defined with subpixel accuracy, beyond the nominal pixel
resolution of the image: [link to Floating point selections]. Line Selections (see Line Selection Tools)
are created with floating-point coordinates if the Sub-pixel resolution checkbox is active in
Edit -> Options > Profile Plot Options. . ."

I'm not sure how a floating-point coordinate would be used, but this paragraph suggests the difference between pixel and subpixel resolution is more than cosmetic.

Best regards,
Neil

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