error: ‘type’ is not a member of ‘cv::DataType＜cv:DataType＜cv::KeyPoint＞‘

问题描述：

在ubuntu编译别人的项目时，报错：error: ‘type’ is not a member of ‘cv::DataType<cv:DataType < cv::KeyPoint>’

解决：

最后找到了终于解决了方案:https://github.com/ros-perception/image_pipeline/issues/308
在.h文件或者引用库前面加上一句

#define OPENCV_TRAITS_ENABLE_DEPRECATED

例如我的程序：