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Re: adding subset image into larger one [message #70169 is a reply to message #70168]

Tue, 23 March 2010 18:01

penteado
Messages: 866
Registered: February 2018

Senior Member
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On Mar 23, 9:53 pm, Suguru Amakubo <sfa2...@googlemail.com> wrote:
> I am under the impression that
>
> new_image[tr_point[0,a]:tr_point[0,a] $
> +L-1,tr_point[1,a]:tr_point[1,a]+L-1] += temp_image
>
> will define the portion of new_image as temp_image (please tell me if
> I am making a critical mistake) :)

Yes, it is a critical mistake. You are not seeing the difference
between the operators (=) and (+=). As Jeremy said,

a+=b

means*

a=a+b

Which seems to be what you want.

(*) The two expressions do not mean the same when evaluating a has
side effects, which is not the case here.

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[Message index]

		Re: adding subset image into larger one By: Suguru Amakubo on Tue, 23 March 2010 19:02
		Re: adding subset image into larger one By: penteado on Tue, 23 March 2010 18:01
		Re: adding subset image into larger one By: Suguru Amakubo on Tue, 23 March 2010 17:53
		Re: adding subset image into larger one By: penteado on Tue, 23 March 2010 17:29
		Re: adding subset image into larger one By: Suguru Amakubo on Tue, 23 March 2010 17:27
		Re: adding subset image into larger one By: wlandsman on Tue, 23 March 2010 17:22
		Re: adding subset image into larger one By: Suguru Amakubo on Tue, 23 March 2010 17:08
		Re: adding subset image into larger one By: penteado on Tue, 23 March 2010 11:21
		Re: adding subset image into larger one By: Jeremy Bailin on Tue, 23 March 2010 11:07
		Re: adding subset image into larger one By: Suguru Amakubo on Tue, 23 March 2010 09:59
		Re: adding subset image into larger one By: jeanh on Tue, 23 March 2010 09:14
		Re: adding subset image into larger one By: penteado on Tue, 23 March 2010 19:19

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