| xroi large images [message #42626] |
Thu, 17 February 2005 02:58  |
Karsten Rodenacker
Messages: 98
Registered: July 1997
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Member |
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I have a small problem to draw in xroi a box if the image is large and
hence displayed with scroll bars. Is there any knowledge how to draw the
box into the image not displayed?
Thanks in advance
Karsten
I am using a small routine:
function xroi_pick, image, box=box, square=square
xroi,bytscl(image),regions_out=r,/block,tools='Rectangle'
if obj_valid(r) then begin
r->getProperty,data=d
xmin=min(d[0,*],max=xmax)
ymin=min(d[1,*],max=ymax)
box=[xmin,ymin,xmax,ymax]
obj_destroy,r
if keyword_set(square) then begin
dx=xmax-xmin+1
dy=ymax-ymin+1
if dx lt dy then box=[xmin,ymin,xmax,ymin+dx-1] $
else box=[xmin,ymin,xmin+dy-1,ymax]
endif
return,n_elements(size(image,/dim)) eq 2? $
image[xmin:box[2],ymin:box[3]]:image[*,xmin:box[2],ymin:box[ 3]]
endif else return, -1l
end
--
Karsten Rodenacker
------------------------------------------------------------ -------- :-)
GSF - Forschungszentrum Institute of Biomathematics and Biometry
D-85758 Oberschleissheim Postfach 11 29
Karsten.Rodenacker@gsf.de | http://ibb.gsf.de/
http://ibb.gsf.de/homepage/karsten.rodenacker/
Tel: +49 89 31873401 | FAX: ..3369
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| Re: xroi large images [message #42681 is a reply to message #42626] |
Fri, 18 February 2005 06:21  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Karsten Rodenacker writes:
> I have a small problem to draw in xroi a box if the image is large and
> hence displayed with scroll bars. Is there any knowledge how to draw the
> box into the image not displayed?
I haven't really looked at the XROI code, but I suspect
it will have to be modified so that in the section dealing
with MOTION events associated with drawing the rubberband
box you are also looking to see if the viewport needs to
be moved. No time this morning to check to see if this
is easy or extremely hard. XROI has never really been my
favorite example of well-written IDL code. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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