Re: Circular ROI scanning and rotating an ROI about the image canvas centre

Posted by John Oreopoulos on Oct 23, 2015; 9:42pm
URL: http://imagej.273.s1.nabble.com/Circular-ROI-scanning-and-rotating-an-ROI-about-the-image-canvas-centre-tp5014750p5014751.html

Okay,

I've figured out how to do #1 using the Edit->Selection->Rotate command, so now all I need is some help with help #2.

John


On 2015-10-23, at 5:20 PM, John Oreopoulos wrote:

> Dear ImageJ community,
>
> I need some help developing some ImageJ code.
>
> I'm looking for two pieces of code that that would allow the following:
>
> 1. I'd like to scan a circular ROI about a circle centred on the image canvas.
>
> 2. I'd like to rotate a ROI not about the centre of the ROI, but about the centre of the image canvas by a specified angular amount.
>
> At the end of the day, I think all I need for #1 is a list of co-ordinates for the circular ROI running about the circle where I can specify the angular resolution between each coordinate set (ideally about 0.005 deg).
> For #2, my instincts say this is a linear algebra problem, but I'm not sure how that would be done in ImageJ or even if it can be done in ImageJ.
>
> Any ideas?
>
> Sincerely,
>
> John Oreopoulos
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