From cb049657e5c4db8e94c14f797eef7bb8662c5450 Mon Sep 17 00:00:00 2001
From: Dmitry-Me <wipedout@yandex.ru>
Date: Tue, 2 Dec 2014 14:44:09 +0300
Subject: [PATCH] Prevent division by zero

---
 modules/calib3d/src/posit.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/calib3d/src/posit.cpp b/modules/calib3d/src/posit.cpp
index 14c33e1e7..07baa5a3f 100644
--- a/modules/calib3d/src/posit.cpp
+++ b/modules/calib3d/src/posit.cpp
@@ -118,7 +118,6 @@ static  CvStatus  icvPOSIT( CvPOSITObject *pObject, CvPoint2D32f *imagePoints,
     int count = 0, converged = 0;
     float inorm, jnorm, invInorm, invJnorm, invScale, scale = 0, inv_Z = 0;
     float diff = (float)criteria.epsilon;
-    float inv_focalLength = 1 / focalLength;
 
     /* Check bad arguments */
     if( imagePoints == NULL )
@@ -139,6 +138,7 @@ static  CvStatus  icvPOSIT( CvPOSITObject *pObject, CvPoint2D32f *imagePoints,
         return CV_BADFACTOR_ERR;
 
     /* init variables */
+    float inv_focalLength = 1 / focalLength;
     int N = pObject->N;
     float *objectVectors = pObject->obj_vecs;
     float *invMatrix = pObject->inv_matr;