Returning an image from the viewer

[Josh Warner]

There was some discussion about the save functionality in the original PR. 
I admit, I advocated to change "File -> Save As" from saving the overlay to 
saving the actual image the user sees... so feel free to send some blame 
for the present behavior my way.

There should be an option to add a Save Overlay *button* which should allow 
you to grab the overlay specifically. As to your second question: I think 
you can send data either to a file, or to a buffer which can be read out 
using `skimage.io.pop`. I've used this before, but my memory is a bit fuzzy 
on it now. If this isn't currently available for scripting like your 
hoped-for functionality example, I'm sure it could be implemented.

Thanks for the PR fixing the save dialog if it's RGB!


On Monday, October 28, 2013 2:19:03 AM UTC-5, Juan Nunez-Iglesias wrote:
>
> Hi all, but especially @tonysyu:
>
> I'm using the viewer for the first time to add some interactivity to my 
> work. Please forgive the noobish-ness: I've only ever worked on 
> command-line stuff. (Thanks btw to @tonysyu for his awesome SciPy lightning 
> talk, which inspired me to even dip my toes in this!)
>
> I'm running an RGB image through a bunch of thresholding and morphological 
> operations, and I want to fiddle with the parameters before getting back 
> the filter output. I'm running into the following problems:
>
> 1) The file > save as dialog saves a composite image of the overlay and 
> underlying image, where I just want the overlay.
> 2) The file > save as dialog actually crashes when the underlying image is 
> RGB! (PR forthcoming)
> 3) But most of all, I don't actually want to save the overlay, I just want 
> to return it to the calling process. How would one go about this? Here's my 
> code now:
>
> v = viewer.ImageViewer(rgbs[0])
> v += CentroPlugin()
> v.show()
>
>
> which works as expected. I'd like something like:
>
> v = viewer.ImageViewer(rgbs[0])
> v += CentroPlugin()
> overlay = v.show()
>
> Is this possible?
>
> Thanks,
>
> Juan.
>
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