OpenCV(CvHaarClassifierCascade *)cvLoad不加载,无法加载xml文件 [英] OpenCV (CvHaarClassifierCascade*) cvLoad doesn't load , unable to load xml file
问题描述
我想使用OpenCv 2.3进行脸部侦测。
我试图加载haarcascade_frontalface_alt_tree.xml在我的项目,我不断无法加载xml文件。
I'm trying face detection using OpenCv 2.3 . My trying to load "haarcascade_frontalface_alt_tree.xml" on my project , I'm constantly unable to load the xml file.
CvHaarClassifierCascade * pCascade = 0; // the face detector
const char* file ="C:\OpenCV2.3\opencv\data\haarcascades\haarcascade_frontalface_alt_tree.xml" ;
pCascade = (CvHaarClassifierCascade*) cvLoad(file , NULL, NULL, NULL);
if (!pCascade) {
exit(-1); // unable to load xml
}
我相信我会遇到同样的问题作为此问题
我试图在cvLoad命令之前加载图像,但是没有帮助。
I have tried to load an image before the cvLoad command , but it didn't help.
我使用OpenCV 2.3,就像在此教程
I'm using OpenCV 2.3 , made my configuration just like in this tutorial
我使用这些库(我认为我的配置是正确的,文件存在,可以使用Notepad ++打开)
I'm using those libraries ( I presume my configurations are correct, the file exist and can be open using Notepad++ )
#include <stdio.h>
#include "opencv2\opencv.hpp"
#include "cv.h"
#include "highgui.h"
//#include "cvaux.h"
using namespace cv;
#pragma comment(lib, "opencv_core230d.lib")
#pragma comment(lib, "opencv_highgui230d.lib")
//#pragma comment(lib, "opencv_contrib230d.lib")
//#pragma comment(lib, "opencv_calib3d230d.lib")
//#pragma comment(lib, "opencv_features2d230d.lib")
//#pragma comment(lib, "opencv_flann230d.lib")
//#pragma comment(lib, "opencv_gpu230d.lib")
#pragma comment(lib, "opencv_haartraining_engined.lib")
#pragma comment(lib, "opencv_imgproc230d.lib")
//#pragma comment(lib, "opencv_legacy230d.lib")
//#pragma comment(lib, "opencv_ml230d.lib")
//#pragma comment(lib, "opencv_objdetect230d.lib")
//#pragma comment(lib, "opencv_video230d.lib")
推荐答案
要缩小问题,在调用 cvLoad
之前,如果文件存在。这里有一种方法:
To narrow down the issue, before calling cvLoad
you should check to see if the file exists. Here's one way:
struct stat buf;
int statResult = stat(file,&buf);
if (statResult || buf.st_ino < 0) {
cout << "File not found: " << file << endl;
exit(-2);
}
您需要 #include< sys /stat.h>
在我的系统(OS X 10.6.8 / OpenCV 2.3 ),当我尝试加载 haarcascade_frontalface_alt_tree.xml
或 haarcascade_frontalface_alt.xml
时,会出现异常:
On my system (OS X 10.6.8/OpenCV 2.3), when I attempt to load haarcascade_frontalface_alt_tree.xml
or haarcascade_frontalface_alt.xml
I get an exception:
OpenCV Error: Unspecified error (The node does not represent a user object (unknown type?)) in cvRead, file /Users/steve/Development/opencv2/opencv/modules/core/src/persistence.cpp, line 4857
我想你使用的是过时的OpenCV 1教程,不能使用当前版本的 haarcascade_frontalface_alt_tree.xml
。请尝试此OpenCV 2教程。该教程中的代码适用于我:
I think you are using an outdated OpenCV 1 tutorial that doesn't work with the current version of haarcascade_frontalface_alt_tree.xml
. Try this OpenCV 2 tutorial instead. This code from that tutorial works for me:
CascadeClassifier face_cascade;
if (!face_cascade.load( file) ) {
cout << "Couldn't load face_cascade" << endl;
exit(-1);
}
cout << "Loaded face_cascade" << endl;
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