原博客搬移到：https://blog.csdn.net/u013171226/article/details/108062603
某项目中opencv版本由opencv3更换为opencv4之后，之前的代码编译出错，
error: ‘CV_BGR2GRAY’ was not declared in this scope
这是由于版本更新，宏定义发生了改变。
修改方法为：将CV_BGR2GRAY改为cv::COLOR_BGR2GRAY
error: ‘CV_BGR2GRAY’ was not declared in this scope
免责声明！
本站转载的文章为个人学习借鉴使用，本站对版权不负任何法律责任。如果侵犯了您的隐私权益，请联系本站邮箱yoyou2525@163.com删除。
猜您在找
cvtColor(src, src_gray, CV_BGR2GRAY)报错
error: ‘CV_RGB2GRAY’ was not declared in this scope 的解决方法
C++ OpenCV cvtColor CV_BGR2GRAY未声明的标识符的解决办法
OpenCV 颜色空间转换参数CV_BGR2GRAY改变
OpenCV 4 (C++) 解决 "error: ‘CV_FOURCC’ was not declared in this scope"
[Error] 'strlen' was not declared in this scope
error: 'nullptr' was not declared in this scope
error: ‘errno’ was not declared in this scope
【error】'isnan' was not declared in this scope
【QT】error: 'SIGNAL' was not declared in this scope