问题描述及原因分析

Opencv在更新到 新版本 后，在运行有些 旧版本 的代码时会出现此类情况

解决方案：

error: ‘CV_AA’ was not declared in this scope

在头文件中添加 #include <opencv2/imgproc/imgproc_c.h>

error: ‘CV_CALIB_CB_ADAPTIVE_THRESH’ was not declared in this scope

在头文件中添加 #include <opencv2/calib3d/calib3d_c.h>

error: ‘CV_GRAY2BGR’ was not declared in this scope

在头文件中添加 #include <opencv2/imgproc/types_c.h>

error: ‘CV_FONT_HERSHEY_SIMPLEX’ was not declared in this scope

Use cv::FONT_HERSHEY_SIMPLEX instead of CV_FONT_HERSHEY_SIMPLEX