weird behaviour of skimage.transform.rotate()

[Sigmund Neher]

ahh, ok. And rotate() returns a float.

Thanks for the quick help!


On Wed, Nov 13, 2013 at 12:25 PM, Johannes Schönberger <jsch at demuc.de>wrote:

> Hi,
>
> it is working as expected. You are just dealing with a dtype issue here.
>
> np.ones((30, 30)) => dtype=double with valid values between [0, 1] as a
> convention in skimage.
>
> Replace np.ones((30,30)) with im_array = np.ones((30,30), dtype=np.uint8)
> and your issues should be fixed.
>
> Hope it helps.
>
> Am 13.11.2013 um 12:19 schrieb Sigmund <siggin at gmail.com>:
>
> > Moin moin!
> >
> > (Enthought Canopy Python 2.7.3 | 64-bit | (default, Aug  8 2013,
> 05:30:12) [MSC v.1500 64 bit (AMD64)] on win32)
> >
> > I noticed that the rotate function is not working correct for me or at
> least not in the way I expect it to function.
> > Could someone check this or tell me what I'm doing wrong.
> > I would like to rotate a image/array for some degrees.
> >
> > import numpy as np
> > import matplotlib.pyplot as plt
> > import skimage.transform as sk_trans
> > im_array = np.ones((30,30))
> > im_array[12,:]=2
> > im_array[13,:]=3
> > im_array[14,:]=4
> > im_array[15,:]=5
> > im_array[16,:]=4
> > im_array[17,:]=3
> > im_array[18,:]=2
> > img_rot = sk_trans.rotate(im_array,45)
> > plt.imshow(im_array,interpolation='none')
> > plt.show()
> > plt.imshow(img_rot,interpolation='none')
> > plt.show()
> >
> >
> >
> >
> > Thanks
> > Siggi
> >
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