fix build error.

675134ea · 塚本信男 · d511587c · 675134ea
Commit 675134ea authored Nov 19, 2018 by 塚本信男
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sobelfilterwidget.cpp modules/cvv/src/qtutil/filter/sobelfilterwidget.cpp +1 -0

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--- a/modules/cvv/src/qtutil/filter/sobelfilterwidget.cpp
+++ b/modules/cvv/src/qtutil/filter/sobelfilterwidget.cpp
@@ -12,6 +12,7 @@

 namespace cvv
 {
+using namespace cv;
 namespace qtutil
 {