Imshow and Linescan - first version

[Guillaume Gay]

Hi all,

Here is a first version of the linescan implementation. It sort of 
works, but I have some issues:

-the major one is that when I instantiate the LineScanInteractor within 
the imshow() function definition, I don't catch the events any more. So 
this is not usable in an interactive session.

-I can't get the ticks on the linescan plot to update properly...

-also there should be some kind of a reset mechanism, because if the 
image is zoomed in, you can lost the handles of the line

So if any one have a hint on how to do this...

Meanwhile I can try to have this work in conjunction tifffile's imshow 
(which should not be so complicated).

With all that maybe it would be better to implement a subclass of 
FigureCanvas, so that linescan appears only when a button (at the bottom 
of the window) is pressed, and it is easy to add e.g. a histogram plot 
or a contrast setter... what do you think?


Bye

Guillaume





Le 20/02/2012 12:11, Guillaume Gay a écrit :
> Ok, I can give it a try...
>
> Some questions then:
>
> - skivi is pure Qt, so must I keep it that way (no matplotlib 
> dependency)?
> - skivi is good for RGB images, but not so much for greyscale... Also 
> data conversion from uint16 to uint8 turns everything black (it set 
> anything > 256 to 0), shall this be corrected?
> -Christoph Gohlke tifffile.imshow() is somehow closer to what us 
> microscopy guys are expecting (more suitable for those greyscale 
> multipage tiffs), though some features of the fancy viewer such as the 
> contrast settings, are great. Also it is a pure matplotlib 
> implementation and the intensity value reading is already there. So my 
> question is:
> Are those tools needed by the general image analysis skimage community 
> are more by scientific tiff users? If the latest, my guess is that 
> building on top of matplotlib and Christoph's implementation of imshow 
> is a better tactic (plus it would be more cross platform, as this can 
> be a widget irrespective of the backend).
>
> Cheers,
>
> Guillaume
>
>
>
>
> Le 20/02/2012 08:04, Stéfan van der Walt a écrit :
>> On Fri, Feb 17, 2012 at 6:53 AM, Guillaume Gay
>> <guillaume at mitotic-machine.org>  wrote:
>>> I just happen to code a simple linescan function, if that helps...
>> Thanks, Guillaume!  If you could integrate this with the fancy Qt
>> imshow to display the line, that would be wonderful, but otherwise I'm
>> sure we'll still be able to use this code.
>>
>> Stéfan
>>
>

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