From 0692bf5f3410040eadaedc2048648271ceb1c39a Mon Sep 17 00:00:00 2001
From: Yan Wang <yan.wang@linux.intel.com>
Date: Thu, 6 Nov 2014 12:46:04 +0800
Subject: [PATCH] Fix HoughLines crashes (Bug #3959).

Avoid phi exceed PI/2 to get the negative value of cos(phi).
---
 modules/imgproc/src/hough.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/imgproc/src/hough.cpp b/modules/imgproc/src/hough.cpp
index 88482b4..f7c0efc 100644
--- a/modules/imgproc/src/hough.cpp
+++ b/modules/imgproc/src/hough.cpp
@@ -303,7 +303,7 @@ HoughLinesSDiv( const Mat& img,
                      ti1 < halftn; ti1++, phi += theta_it, phi1 += scale_factor )
                 {
                     rv = r0 * std::cos( phi );
-                    i = cvFloor( rv ) * tn;
+                    i = (int)rv * tn;
                     i += cvFloor( phi1 );
                     assert( i >= 0 );
                     assert( i < rn * tn );
-- 
2.7.4