From e1b66ffd0168ea6f8b3c4465e5927e343a444ea1 Mon Sep 17 00:00:00 2001 From: Naoto Mizuno Date: Thu, 22 Mar 2018 16:40:06 +0900 Subject: [PATCH] Fix center of rotation --- .../py_geometric_transformations/py_geometric_transformations.markdown | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/doc/py_tutorials/py_imgproc/py_geometric_transformations/py_geometric_transformations.markdown b/doc/py_tutorials/py_imgproc/py_geometric_transformations/py_geometric_transformations.markdown index ea45180..2af8080 100644 --- a/doc/py_tutorials/py_imgproc/py_geometric_transformations/py_geometric_transformations.markdown +++ b/doc/py_tutorials/py_imgproc/py_geometric_transformations/py_geometric_transformations.markdown @@ -90,7 +90,8 @@ below example which rotates the image by 90 degree with respect to center withou img = cv.imread('messi5.jpg',0) rows,cols = img.shape -M = cv.getRotationMatrix2D((cols/2,rows/2),90,1) +# cols-1 and rows-1 are the coordinate limits. +M = cv.getRotationMatrix2D(((cols-1)/2.0,(rows-1)/2.0),90,1) dst = cv.warpAffine(img,M,(cols,rows)) @endcode See the result: -- 2.7.4