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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

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[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

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