Hi We can consider this as a bug. It must be mentioned in the doc string. But I don’t see a reason why we shouldn’t support N-D or at least 3- and 4-D (3-D plus channels) images… ? Am 15.11.2013 um 21:00 schrieb Raphael Ackermann <raphael.ackermann@gmail.com>:

Hi

I am trying to do template matching. Running http://scikit-image.org/docs/0.9.x/auto_examples/plot_template.html#example-... works perfectly fine. But when I change image = data.coins() --> image = data.lena() to have a non b/w image I get the following error.

Traceback (most recent call last): File "/..../template_matching.py", line 11, in <module> result = match_template(image, coin) File "/usr/local/lib/python2.7/dist-packages/scikit_image-0.9.3-py2.7-linux-x86_64.egg/skimage/feature/template.py", line 80, in match_template result = _template.match_template(image, template) File "_template.pyx", line 50, in skimage.feature._template.match_template (skimage/feature/_template.c:1967) ValueError: Buffer has wrong number of dimensions (expected 2, got 3)

Is it not possible to call match_template() with a color image? Or what am I doing wrong? I can't find anything in the documentation or the code that this should only work for black and white images.

When I replace the scikit-image algorith with one from cv2 result = match_template(image, coin) --> result = cv2.matchTemplate(image, coin, cv2.TM_CCOEFF_NORMED)

I can at least continue further in the example and it finds the coordinates where the template matches.

Is this a bug? If not the documentation/example should be updated to make it clear that this only works for b/w images.

Thanks Raphael

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