From: Yan Wang <yan.wang@linux.intel.com>
Date: Thu, 6 Nov 2014 04:46:04 +0000 (+0800)
Subject: Fix HoughLines crashes (Bug #3959).
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~2844^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0692bf5f3410040eadaedc2048648271ceb1c39a;p=platform%2Fupstream%2Fopencv.git

Fix HoughLines crashes (Bug #3959).

Avoid phi exceed PI/2 to get the negative value of cos(phi).
---

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 );