diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f41250..9ad0b6b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,7 +60,7 @@ set(CMAKE_INSTALL_RPATH_USE_LINK_PATH FALSE) # 存在上面一句，此句好像
 
 
 # Try to find OpenCV
-find_package(OpenCV 3.4)
+find_package(OpenCV 3)
 if (OpenCV_FOUND)
     # If the package has been found, several variables will
     # be set, you can find the full list with descriptions
diff --git a/main.cpp b/main.cpp
index 0e237ae..2ecf84b 100644
--- a/main.cpp
+++ b/main.cpp
@@ -29,7 +29,6 @@ int main(int argc, char** argv)
 	fprintf(stdout,"%s Version %d.%d\n", argv[0],
             DEHAZE_VERSION_MAJOR,
             DEHAZE_VERSION_MINOR);
-    fprintf(stdout,"Usage: %s number\n",argv[0]);
 	log_info("Start");
 	CvCapture* cvSequence = cvCaptureFromFile(argv[1]);
 
@@ -59,8 +58,6 @@ int main(int argc, char** argv)
 
 	cout << nFrame <<" frames " << (float)(clock()-start_t)/CLOCKS_PER_SEC << "secs" <<endl;
 
-	getchar();
-
 	cvReleaseCapture(&cvSequence); 
  	cvReleaseImage(&imOutput);
 	log_info("End");