Would it be possible to have a version that looks to the user like a
RectangleSelector widget but works for the programmer like ginput? That is,
it returns the coordinates of the rectangle.
This would be really useful for implementing a user image crop function,
similar to matlab's imcrop for example.
One can functionally do this with:
import os.path, sys
import pylab
import Image
img = Image.open('test_image.png')
fig = pylab.imshow(img, origin='lower')
print "Please click on top left, bottom right of crop area"
x = pylab.ginput(2) #PIL and matplotlib have different origin
roi = img.crop([int(x[0][0]),int(img.size[1]-x[0][1]),
int(x[1][0]),int(img.size[1]-x[1][1])])
filenm = os.path.join(sys.path[0], 'crop_image.png')
roi.save(filenm)
show()
But users expect a rectangle for cropping.
I've had a look a the BlockingMouseInput class but its all a bit beyond me
at the moment.
David, since you are a recent matlab user and are deeply versed in the
blocking code: how hard would it be to simply provide a (mostly)
matlab compatible imcrop function, and is this something you are
interested in doing?
JDH
···
On Tue, Aug 5, 2008 at 6:26 PM, Elfnor <elfnor@...287...> wrote:
This would be really useful for implementing a user image crop function,
similar to matlab's imcrop for example.
Sorry for the long delay - I have been on vacation. I don't use the
imcrop function, but it looks fairly easy to implement using ginput. I
am heading off for vacation again for another two weeks and I want to
get in some of the changes I proposed a long while ago before working on
this, so it might be a while, but if no one can take it on first, I can
give a look next month.
Cheers,
David
···
On Tue, 2008-08-05 at 19:51 -0500, John Hunter wrote:
On Tue, Aug 5, 2008 at 6:26 PM, Elfnor <elfnor@...287...> wrote:
> This would be really useful for implementing a user image crop function,
> similar to matlab's imcrop for example.
David, since you are a recent matlab user and are deeply versed in the
blocking code: how hard would it be to simply provide a (mostly)
matlab compatible imcrop function, and is this something you are
interested in doing?
JDH
--
**********************************
David M. Kaplan
Charge de Recherche 1
Institut de Recherche pour le Developpement
Centre de Recherche Halieutique Mediterraneenne et Tropicale
av. Jean Monnet
B.P. 171
34203 Sete cedex
France