Question

opencv3.0中ellipse在哪个文件里包含

Answer 1

opencv从2.2版本以后<opencv root>include下有两个文件夹 opencv 和opencv2。从官方的意思来看，它逐渐喜欢用opencv2里面的那种包含头文件的方式。
注意：<opencv root>是opencv2.2安装路径。每个人的路径都可能有所不同！！
Opencv.hpp本身是一个头文件，它包含了opencv全部的头文件。有图有真相：
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#ifndef __OPENCV_ALL_HPP__

#define __OPENCV_ALL_HPP__

#include "opencv2/core/core_c.h"

#include "opencv2/core/core.hpp"

#include "opencv2/flann/flann.hpp"

#include "opencv2/imgproc/imgproc_c.h"

#include "opencv2/imgproc/imgproc.hpp"

#include "opencv2/video/tracking.hpp"

#include "opencv2/video/background_segm.hpp"

#include "opencv2/features2d/features2d.hpp"

#include "opencv2/objdetect/objdetect.hpp"

#include "opencv2/calib3d/calib3d.hpp"

#include "opencv2/ml/ml.hpp"

#include "opencv2/highgui/highgui_c.h"

#include "opencv2/highgui/highgui.hpp"

#include "opencv2/contrib/contrib.hpp"

#endif
除此之外的的都是文件夹，每一个文件夹都是一个头文件，仅此而已。所以如果你配置编译器包含文件的时候是：C:\OpenCV-2.2.0\VS2008\include，那当你想用这种新的方式调用opencv函数的时候，那最简单最可靠的方式就是：

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#include “opencv2/opencv.hpp”