在opencv3中可編譯通過，但opencv4中無法編譯，報錯：
error: CV_COMP_CORREL was not declared in this scope.
是因為opencv4中CV_COMP_CORREL定義在types_c.h文件中，只需包含以下頭文件即可。
#include <opencv2/imgproc/types_c.h>
CV_COMP_CORREL not declared
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