1.1 cv::TermCriteria
The class defining termination criteria for iterative algorithms(这个类定义了迭代算法的终止准则)
枚举类
enum Type {
COUNT =1,
MAX_ITER =COUNT,
EPS =2
}
EnumeratorMeaningCOUNTthe maximum number of iterations or elements to compute最大迭代次数MAX_ITERditto最大迭代次数EPSthe desired accuracy or change in parameters at which the iterative algorithm stops迭代算法停止时所需的精度或参数变化
cv::TermCriteria::TermCriteria()
cv::TermCriteria::TermCriteria(int type, int maxCount, double epsilon)
typeThe type of termination criteria, one of TermCriteria::TypemaxCountThe maximum number of iterations or elements to computeepsilonThe desired accuracy or change in parameters at which the iterative algorithm stops
2.1 identifier “CV_AA” is undefined：
#include
2.2 identifier “CV_GRAY2RGB” is undefined：
#include
2.3 identifier “CV_CALIB_CB_ADAPTIVE_THRESH” is undefined
CV_CALIB_CB_NORMALIZE_IMAGE
CV_CALIB_CB_FILTER_QUADS
CV_CALIB_CB_FAST_CHECK
CV_CALIB_CB_NORMALIZE_IMAGE
CV_CALIB_CB_FAST_CHECK
CV_CALIB_CB_ADAPTIVE_THRESH
CV_CALIB_CB_FILTER_QUADS
#include
2.4 fatal error: opencv/cv.h: No such file or directory
找不到opencv/cv.h文件
include
#include
2.5 fatal error: opencv/highgui.h: No such file or directory
#include
2.6 error: ‘CV_FONT_HERSHEY_SIMPLEX’ was not declared in this scope
CV_FONT_HERSHEY_SIMPLEX--->FONT_HERSHEY_SIMPLEX
opencv4部分取消了CV_前缀
正确作法：
#include
2.7 error: ‘CV_WINDOW_NORMAL’ was not declared in this scope
#include
2.8 error: ‘CV_INTER_LINEAR’ was not declared in this scope
将CV_删除转到变量定义查看某hpp，再寻找所对应的.h文件
#include
2.9 error: ‘CV_LOAD_IMAGE_GRAYSCALE’ was not declared in this scope
#include
2.10 pcl的一大段错误
2.11 error: ‘CvMat’ does not name a type
error: ‘CvMat’ has not been declared
cvCreateMat()
添加头文件
#include
#include
2.12 error: static assertion failed: std::map must have the same value_type as its allocator on Ubuntu 20.04
2.13 编译DBoW2等出现”OpenCV > 2.4.3 not found.”
make[2]: *** No rule to make target '../Thirdparty/DBoW2/lib/libDBoW2.so', needed by '../lib/libORB_SLAM2.so'
改成对应的版本
2.14 Pangolin出错（orb_slam2在ubuntu20.04上编译时）
2.15 fatal error: opencv/cxcore.h: No such file or directory
#include
2.16 CV_LOAD_IMAGE_UNCHANGED
添加头文件
#include
或者修改为
cv::IMREAD_UNCHANGED
2.17 CV_MINMAX
添加头文件
#include
Original: https://blog.csdn.net/weixin_43848456/article/details/123380782
Author: xlsemmmmmm
Title: opencv常见用法和opencv3-＞opencv4版本切换
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