From 0f71278a1081f89238252f896cec73a23f39cfa7 Mon Sep 17 00:00:00 2001
From: "Gregory R. Lee" <gregory.lee@cchmc.org>
Date: Wed, 27 Jan 2016 12:36:22 -0500
Subject: [PATCH] revert simple_metrics to np.float64 computations for all
 input types

---
 skimage/measure/simple_metrics.py | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/skimage/measure/simple_metrics.py b/skimage/measure/simple_metrics.py
index 01bd0f29..399bcf99 100644
--- a/skimage/measure/simple_metrics.py
+++ b/skimage/measure/simple_metrics.py
@@ -16,12 +16,11 @@ def _assert_compatible(X, Y):
 
 
 def _as_floats(X, Y):
-    """Promote X, Y to nearest appropriate floating point precision."""
-    float_type = np.result_type(X.dtype, Y.dtype, np.float32)
-    if X.dtype != float_type:
-        X = X.astype(float_type)
-    if Y.dtype != float_type:
-        Y = Y.astype(float_type)
+    """Promote X, Y to floating point precision."""
+    if X.dtype != np.float64:
+        X = X.astype(np.float64)
+    if Y.dtype != np.float64:
+        Y = Y.astype(np.float64)
     return X, Y