1、C++
OpenCV在C++中的版本号在<opencv2/core/version.hpp>里面，贴出部分和版本相关的定义
// opencv2 #define CV_VERSION_EPOCH 2 #define CV_VERSION_MAJOR 4 #define CV_VERSION_MINOR 13 #define CV_VERSION_REVISION 4
//opencv3 #define CV_VERSION_MAJOR 3 #define CV_VERSION_MINOR 4 #define CV_VERSION_REVISION 1 #define CV_VERSION_STATUS ""
CV_VERSION_EPOCH是OpenCV2指定主版本号“2”的宏定义，只在OpenCV2中有，因此可使用如下代码来区分是OpenCV2还是OpenCV3
#include <iostream>
#include <opencv2/core/version.hpp>
#include <opencv2/core/core.hpp>
using namespace cv;
#if CV_VERSION_EPOCH == 2
#define OPENCV2
#elif CV_VERSION_MAJOR == 3
#define OPENCV3
#else
#error Not support this OpenCV version
#endif
int main() {
#ifdef OPENCV2
std::cout << "Hello, OpenCV2!" << std::endl;
#elif defined(OPENCV3)
std::cout << "Hello, OpenCV3!" << std::endl;
#endif
return 0;
}2、Python
import cv2
if __name__ == "__main__":
version = cv2.__version__
if version.split('.')[0]=="3":
print("this is opencv3")
else:
print("this is opencv2")---------------------
作者：hackpig
来源：www.skcircle.com
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