[英]OpenCV C++ error in Xcode
I have built the OpenCV libraries using the cmake
build system as described here and have added the header, '.a' and '.dylib' files to my terminal c++ project. 我已经按照此处所述使用cmake
构建系统构建了OpenCV库,并将标头“ .a”和“ .dylib”文件添加到了我的终端c ++项目中。 However when I run the code below (got it from http://iphone-cocoa-objectivec.blogspot.com/2009/01/using-opencv-for-mac-os-in-xcode.html ), it gives me the errors below. 但是,当我运行下面的代码(从http://iphone-cocoa-objectivec.blogspot.com/2009/01/using-opencv-for-mac-os-in-xcode.html获取 )时,它给了我错误如下。 Has anyone got any advice? 有没有人得到任何建议? Any help will be much appreciated. 任何帮助都感激不尽。
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <cv.h>
#include <highgui.h>
int main()
{
//get the image from the directed path
IplImage* img = cvLoadImage("/Users/somedir/Programming/TestProj/fruits.jpg", 1);
//create a window to display the image
cvNamedWindow("picture", 1);
//show the image in the window
cvShowImage("picture", img);
//wait for the user to hit a key
cvWaitKey(0);
//delete the image and window
cvReleaseImage(&img);
cvDestroyWindow("picture");
//return
return 0;
}
Errors 失误
Undefined symbols:
"_cvLoadImage", referenced from:
_main in main.o
"_cvNamedWindow", referenced from:
_main in main.o
"_cvReleaseImage", referenced from:
_main in main.o
"_cvShowImage", referenced from:
_main in main.o
"_cvDestroyWindow", referenced from:
_main in main.o
"_cvWaitKey", referenced from:
_main in main.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
First of all, don't build the libs with CMake, better to get them from macports on mac, you can easily update to the newer version with a one-liner... 首先,不要使用CMake构建库,最好从mac上的macports中获取它们,您可以轻松地使用单线更新到较新版本...
Plus, if you would use the cv::Mat
interfaces with 另外,如果您将cv::Mat
接口与
#include <opencv2/core/core.hpp>
and #include <opencv2/highgui/highgui.hpp>
things would go better... ;) Include the dylib libraries with versions at the end of their name. #include <opencv2/core/core.hpp>
和#include <opencv2/highgui/highgui.hpp>
会更好...;)包括名称末尾带有版本的dylib库。 (I think the version-less dylibs are for the old interface #include) (我认为无版本的dylib是用于旧界面#include的)
For starters: 对于初学者:
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace cv;
int main()
{
//get the image from the directed path
Mat img = loadImage("/Users/somedir/Programming/TestProj/fruits.jpg");
//show the image in the window
imshow("picture", img);
//wait for the user to hit a key
waitKey(0);
//delete the image and window (automatic)
return 0;
}
Avoid using Xcode with OpenCV 2.0. 避免将Xcode与OpenCV 2.0一起使用。 If using OpenCV use Windows and also use OpenCV 1.1. 如果使用OpenCV,请使用Windows,也请使用OpenCV 1.1。 It will save a lot of headache. 这将节省很多头痛。 When 2.0/Mac are better documented then transition onto Mac platform/2.0 version. 如果更好地记录了2.0 / Mac,请过渡到Mac平台/2.0版本。 The book (O'Reilly) is good - covers v1.1. 这本书(O'Reilly)很不错-涵盖了v1.1。 The next installment for 2.0 should follow soon. 下一版的2.0将很快推出。 1. 1。
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