Remarks for transform.warp function

[Nadav Horesh]

def shift(xy):
    return xy+10

from skimage.transform import warp
from skimage.transform import warp

camera = samples.camera()
warp(camera, shift, output_shape=camera.shape)

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call
last)/home/nadav/pyscripts/<ipython-input-11-ce1e92562ac8> in <module>()
----> 1 warp(camera, shift, output_shape=camera.shape)
/usr/lib64/python3.2/site-packages/scikits_image-0.6dev-py3.2-linux-x86_64.egg/skimage/transform/_warp.py
in warp(image, reverse_map, map_args, output_shape, order, mode, cval)
     92
     93     # Place the y-coordinate mapping

---> 94     _stackcopy(coords[1, ...], tf_coords[0, ...])
     95
     96     # Place the x-coordinate mapping

/usr/lib64/python3.2/site-packages/scikits_image-0.6dev-py3.2-linux-x86_64.egg/skimage/transform/_warp.py
in _stackcopy(a, b)
     23
     24     """
---> 25     a[:] = b[:, :, np.newaxis]
     26
     27 def warp(image, reverse_map, map_args={},
ValueError: output operand requires a reduction, but reduction is not
enabled


  Nadav




2012/5/15 Stéfan van der Walt <stefan at sun.ac.za>

> Hi Nadav
>
> On Tue, May 15, 2012 at 7:24 AM, Nadav Horesh <nadavh.horesh at gmail.com>
> wrote:
> > Remarks for today's skimage snaphot:
> >
> > The documentation state that the input image is a 2D array. In practice
> it
> > can be a colour image.
> > I got failures whenever I used the output_shape parameter
>
> What code are you referring to?
>
> Stéfan
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/scikit-image/attachments/20120515/0ff497e5/attachment.html>