Hi, what version of skimage do you use? Johannes Schönberger Am 19.09.2012 um 13:10 schrieb Nicolas Barthe <lordnio101@gmail.com>:

Hello,

I'm trying to use scikits-image to apply an homography to a color image.

Here's my sample script:

from skimage import data, transform, io from skimage.util import img_as_float import numpy, Image from scipy import ndimage

img = Image.open("test.jpg") data = numpy.asarray(img)

(x_scale,y_scale)=(1.05,1.1) (x_skew,y_skew)=(0.31e-3,0)

S = numpy.array([[x_scale, 0, 0], [0, y_scale, 0], [x_skew, y_skew, 1]])

t1 = datetime.datetime.now() data = transform.homography(data, S) img = Image.fromarray(data) img.show()

The function transform.homography takes about 0.5 second on my core i7 pc to apply the homography on a 1280x720 color image... Is there a way to improve the performance ?

I tried to use "fast_homography" instead of "homography" but I got a "ValueError: Buffer has wrong number of dimensions (expected 2, got 3)" error and I couldn't get it work...

Thanks for your help!

Nicolas.