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Re: clever way to subregion an image? [message #70456 is a reply to message #70388]

Mon, 12 April 2010 11:46

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

Senior Member

"Philip Elson" <philipelson@googlemail.com> wrote in message
news:17e370fa-592b-4441-ac6f-b70fd1ddcad4@u21g2000yqc.google groups.com...
On 9 Apr, 17:05, "R.G. Stockwell" <noem...@please.com> wrote:
> 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

> Use the JPEG2000 object and get this cleverness for free :-)

Thank you Philip! I was not aware that existed. I'm reading through
the documentation now, sounds great.

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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