comp.lang.idl-pvwave archive: archive » clever way to subregion an image?

Home » Public Forums » archive » clever way to subregion an image?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

clever way to subregion an image? [message #70388]

Fri, 09 April 2010 09:05

R.G.Stockwell
Messages: 163
Registered: October 2004

Senior Member

I need to cut an image into 4 equal-size parts, which
obviously is very easy to do in a few lines.
image1 = im[0:nx/2-1, 0:ny/2-1]
image2 = im[0:nx/2-1, ny/2:*]
image3 = im[nx/2:*, 0:ny/2-1]
image4 = im[nx/2:*, ny/2:*]

i came across a way to do this with reform, but
it required 4 steps ( several reforms, a couple transposes)
to do it properly.

I'd be interested (just for fun) in a vectorized general way to do this
if any of you 'dimension jugglers' have any clever ideas,
for how to take an image and cut it into 4, or 16, or 64,
or 256 equal pieces (that would probably be about the maximum)

cheers,
bob

Report message to a moderator

[Message index]

		clever way to subregion an image? By: R.G.Stockwell on Fri, 09 April 2010 09:05
		Re: clever way to subregion an image? By: R.G.Stockwell on Mon, 12 April 2010 11:46
		Re: clever way to subregion an image? By: philipelson on Mon, 12 April 2010 04:16

Previous Topic:	find max in 3D array -- slow
Next Topic:	Printing in one line

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 11:29:25 PDT 2025

Total time taken to generate the page: 0.00488 seconds