diff --git a/modules/calib3d/src/calibration.cpp b/modules/calib3d/src/calibration.cpp
index 002394b917..c03e3a1c34 100644
--- a/modules/calib3d/src/calibration.cpp
+++ b/modules/calib3d/src/calibration.cpp
@@ -2707,11 +2707,11 @@ void cvStereoRectify( const CvMat* _cameraMatrix1, const CvMat* _cameraMatrix2,
                  s0);
 
         double s1 = std::min(std::min(std::min((double)cx1/(cx1_0 - outer1.x), (double)cy1/(cy1_0 - outer1.y)),
-                            (double)(newImgSize.width - cx1)/(outer1.x + outer1.width - cx1_0)),
-                        (double)(newImgSize.height - cy1)/(outer1.y + outer1.height - cy1_0));
+                            (double)(newImgSize.width - 1 - cx1)/(outer1.x + outer1.width - cx1_0)),
+                        (double)(newImgSize.height - 1 - cy1)/(outer1.y + outer1.height - cy1_0));
         s1 = std::min(std::min(std::min(std::min((double)cx2/(cx2_0 - outer2.x), (double)cy2/(cy2_0 - outer2.y)),
-                         (double)(newImgSize.width - cx2)/(outer2.x + outer2.width - cx2_0)),
-                     (double)(newImgSize.height - cy2)/(outer2.y + outer2.height - cy2_0)),
+                         (double)(newImgSize.width - 1 - cx2)/(outer2.x + outer2.width - cx2_0)),
+                     (double)(newImgSize.height - 1 - cy2)/(outer2.y + outer2.height - cy2_0)),
                  s1);
 
         s = s0*(1 - alpha) + s1*alpha;