Merge pull request #11989 from csukuangfj:patch_2

540415dc · Alexander Alekhin · f058b5fb · 84f2f376 · 540415dc
Commit 540415dc authored Jul 17, 2018 by Alexander Alekhin
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Showing with 1 addition and 4 deletions

calibinit.cpp modules/calib3d/src/calibinit.cpp +1 -4

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--- a/modules/calib3d/src/calibinit.cpp
+++ b/modules/calib3d/src/calibinit.cpp
@@ -513,10 +513,6 @@ bool findChessboardCorners(InputArray image_, Size pattern_size,
    {
        cvtColor(img, img, COLOR_BGR2GRAY);
    }
-    else
-    {
-        img.clone();
-    }
    int prev_sqr_size = 0;
@@ -578,6 +574,7 @@ bool findChessboardCorners(InputArray image_, Size pattern_size,
    {
        if (flags & CALIB_CB_NORMALIZE_IMAGE)
        {
+            img = img.clone();
            equalizeHist(img, img);
        }