From bf29b16d1d22d4312776655673c0404c22d61db2 Mon Sep 17 00:00:00 2001
From: Vladislav Vinogradov <no@email>
Date: Tue, 10 May 2011 06:24:44 +0000
Subject: [PATCH] fixed bug in cv::Sobel (ddepth < 0)

---
 modules/imgproc/src/deriv.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/imgproc/src/deriv.cpp b/modules/imgproc/src/deriv.cpp
index 1f2177ea16..536a53a7f9 100644
--- a/modules/imgproc/src/deriv.cpp
+++ b/modules/imgproc/src/deriv.cpp
@@ -474,6 +474,8 @@ void cv::Sobel( const InputArray& _src, OutputArray _dst, int ddepth, int dx, in
                 int ksize, double scale, double delta, int borderType )
 {
     Mat src = _src.getMat();
+    if (ddepth < 0)
+        ddepth = src.depth();
     _dst.create( src.size(), CV_MAKETYPE(ddepth, src.channels()) );
     Mat dst = _dst.getMat();