From 28189c9a66c676fca43397ce8c884cf6bc200cc9 Mon Sep 17 00:00:00 2001
From: Alexis Mignon <alexis.mignon@gmail.com>
Date: Mon, 3 Jun 2013 10:03:57 +0200
Subject: [PATCH] Moved image conversion after the verification of the
 max_value

---
 skimage/filter/_denoise_cy.pyx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/skimage/filter/_denoise_cy.pyx b/skimage/filter/_denoise_cy.pyx
index 097a7596..6fd95f03 100644
--- a/skimage/filter/_denoise_cy.pyx
+++ b/skimage/filter/_denoise_cy.pyx
@@ -137,11 +137,11 @@ def denoise_bilateral(image, Py_ssize_t win_size=5, sigma_range=None,
 
     max_value = image.max()
     
-    cimage = np.ascontiguousarray(image)
-    
     if max_value == 0.0:
         raise ValueError("The maximum value found in the image was 0.")
 
+    cimage = np.ascontiguousarray(image)
+    
     out = np.zeros((rows, cols, dims), dtype=np.double)
     image_data = <double*>cimage.data
     out_data = <double*>out.data