From d2efb6893140e0a038c06c2f157f099f1317a975 Mon Sep 17 00:00:00 2001
From: Davis King <davis@dlib.net>
Date: Wed, 20 Jun 2018 18:23:37 -0400
Subject: [PATCH] Made hysteresis_threshold() return a uint8 image so it's
 consistent with threshold_image().

---
 tools/python/src/image.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/python/src/image.cpp b/tools/python/src/image.cpp
index 261c3e2d0..f6d3be6c9 100644
--- a/tools/python/src/image.cpp
+++ b/tools/python/src/image.cpp
@@ -580,23 +580,23 @@ std::vector<point> py_find_peaks2 (
 // ----------------------------------------------------------------------------------------
 
 template <typename T>
-numpy_image<T> py_hysteresis_threshold (
+numpy_image<unsigned char> py_hysteresis_threshold (
     const numpy_image<T>& img,
     T lower_thresh,
     T upper_thresh
 )
 {
-    numpy_image<T> out;
+    numpy_image<unsigned char> out;
     hysteresis_threshold(img, out, lower_thresh, upper_thresh);
     return out;
 }
 
 template <typename T>
-numpy_image<T> py_hysteresis_threshold2 (
+numpy_image<unsigned char> py_hysteresis_threshold2 (
     const numpy_image<T>& img
 )
 {
-    numpy_image<T> out;
+    numpy_image<unsigned char> out;
     hysteresis_threshold(img, out);
     return out;
 }