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Re: Annoying ROIs [message #53576 is a reply to message #53491] Wed, 18 April 2007 16:26 Go to previous message
Robbie is currently offline  Robbie
Messages: 165
Registered: February 2006
Senior Member
I never thought that annoying would ever be interpreted as such a
strong word, it was merely a play on words. It's more an itch, which
get worse with lower resolution images. I'm actually not saying that
IDL is wrong here, all I have really shown is how to offset IDLgrROI
by half a pixel in the same way that I would offset plots by half a
pixel.

Curiously, I'm supposed to be presenting an abstract next week in
which I have reported that I can copy ROIs from one Nuclear Medicine
scan to another with an average of 1 pixel accuracy. I wanted to make
sure I have this issue resolved before presenting.

P.S, For those who haven't realised, I'm babbling on about the
xcoord_conv=xscale and ycoord_conv=yscale keywords to object graphics.
Not the CONV_COORD function.

More riveting details available at

http://barnett.id.au/idl/annoying_rois/

Robbie
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