From 0027b91e840e5bd3d79b469194959141c8bf015f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johannes=20Scho=CC=88nberger?= <jschoenberger@demuc.de>
Date: Sat, 5 May 2012 13:39:21 +0200
Subject: [PATCH] added test: labelled image must be of integer type

---
 skimage/measure/regionprops.pyx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/skimage/measure/regionprops.pyx b/skimage/measure/regionprops.pyx
index a58ba90b..25cb1e48 100644
--- a/skimage/measure/regionprops.pyx
+++ b/skimage/measure/regionprops.pyx
@@ -186,6 +186,9 @@ def regionprops(image, properties='all'):
     cdef np.ndarray[np.double_t, ndim=2] m, mu, nu
     cdef double cr, cc, a, b, c
 
+    if not np.issubdtype(image.dtype, 'int'):
+        raise TypeError('labelled image must be of integer dtype')
+
     # determine all properties if nothing specified
     if properties == 'all':
         properties = PROPS