Easy masking of RGB images

[Adam Hughes]

Ah, right you are!

Dunno what I was mixed up about...

On Wednesday, November 19, 2014 10:33:21 AM UTC-5, Stefan van der Walt 
wrote:
>
> Hi Adam 
>
> On 2014-11-19 00:01:06, Adam Hughes <hughes... at gmail.com <javascript:>> 
> wrote: 
> > img1 + img 2 --> adds values 
> > img1 U img2 --> replaces values 
> > 
> > Essentially, overlay all the pixels that are not black. 
> > 
> > Is there a library or set of functions somewhere that makes this easy? 
>  I 
> > remember a while back thinking I would have to write my own 
> overlay/masking 
> > utilities to get this behavior, but I hope that's not true. 
>
> It should be fairly straightforward, if I understand correctly: 
>
> mask = (img2 != 0) 
> img1[mask] = img2[mask] 
>
> Regards 
> Stéfan 
>
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