Imshow and Linescan - first version

[Tony Yu]

On Thu, Feb 23, 2012 at 6:22 AM, Guillaume Gay <
guillaume at mitotic-machine.org> wrote:

> 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
>

HI Guillaume,

I don't actually see a link or attachment in this email. Could you point me
to the code you mention above?

Thanks,
-Tony


>
> 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
>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/scikit-image/attachments/20120223/8753a85d/attachment.html>