solve Issue I23683

samples/dnn/text_detection.cpp

@@ -126,7 +126,7 @@ int main(int argc, char** argv)
         // Detection
         std::vector< std::vector<Point> > detResults;
         detector.detect(frame, detResults);
-
+        Mat frame2 = frame.clone();
         if (detResults.size() > 0) {
             // Text Recognition
             Mat recInput;
@@ -153,11 +153,11 @@ int main(int argc, char** argv)
                 std::string recognitionResult = recognizer.recognize(cropped);
                 std::cout << i << ": '" << recognitionResult << "'" << std::endl;
 
-                putText(frame, recognitionResult, quadrangle[3], FONT_HERSHEY_SIMPLEX, 1.5, Scalar(0, 0, 255), 2);
+                putText(frame2, recognitionResult, quadrangle[3], FONT_HERSHEY_SIMPLEX, 1.5, Scalar(0, 0, 255), 2);
             }
-            polylines(frame, contours, true, Scalar(0, 255, 0), 2);
+            polylines(frame2, contours, true, Scalar(0, 255, 0), 2);
         }
-        imshow(kWinName, frame);
+        imshow(kWinName, frame2);
     }
     return 0;
 }