Warning: file_get_contents(/data/phpspider/zhask/data//catemap/9/opencv/3.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
获取OpenCV错误“;“图像步进错误”;在Fisherfaces.train()方法中_Opencv - Fatal编程技术网

获取OpenCV错误“;“图像步进错误”;在Fisherfaces.train()方法中

获取OpenCV错误“;“图像步进错误”;在Fisherfaces.train()方法中,opencv,Opencv,我正在使用OpenCV v2.4.1 这就是我正在使用的代码 #include "opencv2/opencv.hpp" #include <iostream> #include <fstream> #include <sstream> using namespace cv; using namespace std; Mat toGrayscale(InputArray _src) { Mat src = _src.getMat(); //

我正在使用OpenCV v2.4.1

这就是我正在使用的代码

#include "opencv2/opencv.hpp"
#include <iostream>
#include <fstream>
#include <sstream>

using namespace cv;
using namespace std;

Mat toGrayscale(InputArray _src) {
    Mat src = _src.getMat();
    // only allow one channel
    if(src.channels() != 1)
        CV_Error(CV_StsBadArg, "Only Matrices with one channel are supported");
    // create and return normalized image
    Mat dst;
    cv::normalize(_src, dst, 0, 255, NORM_MINMAX, CV_8UC1);
    return dst;
}

void read_csv(const string& filename, vector<Mat>& images, vector<int>& labels, char separator = ';') {
    std::ifstream file(filename.c_str(), ifstream::in);
    if (!file)
        throw std::exception();
    string line, path, classlabel;
    while (getline(file, line)) {
        stringstream liness(line);
        getline(liness, path, separator);
        getline(liness, classlabel);
        images.push_back(imread(path, 0));
        labels.push_back(atoi(classlabel.c_str()));
    }
}

int main(int argc, const char *argv[]) {
    // check for command line arguments
    /*if (argc != 2) {
        cout << "usage: " << argv[0] << " <csv.ext>" << endl;
        exit(1);
    }*/
    // path to your CSV
    string fn_csv = string("at.txt");
    // images and corresponding labels
    vector<Mat> images;
    vector<int> labels;
    // read in the data
    try {
        read_csv(fn_csv, images, labels);
    } catch (exception&) {
        cerr << "Error opening file \"" << fn_csv << "\"." << endl;
        exit(1);
    }
    // get width and height
    //int width = images[0].cols;
    int height = images[0].rows;
    // get test instances
    Mat testSample = images[images.size() - 1];
    int testLabel = labels[labels.size() - 1];
    // ... and delete last element
    images.pop_back();
    labels.pop_back();
    // build the Fisherfaces model
    Ptr<FaceRecognizer> model = createFisherFaceRecognizer();
    model->train(images, labels);
    // test model
    int predicted = model->predict(testSample);
    cout << "predicted class = " << predicted << endl;
    cout << "actual class = " << testLabel << endl;
    // get the eigenvectors
    Mat W = model->eigenvectors();
    // show first 10 fisherfaces
    for (int i = 0; i < min(10, W.cols); i++) {
        // get eigenvector #i
        Mat ev = W.col(i).clone();
        // reshape to original size AND normalize between [0...255]
        Mat grayscale = toGrayscale(ev.reshape(1, height));
        // show image (with Jet colormap)
        Mat cgrayscale;
        applyColorMap(grayscale, cgrayscale, COLORMAP_JET);
        imshow(format("%d", i), cgrayscale);
    }
    waitKey(0);
    return 0;
}
#包括“opencv2/opencv.hpp”
#包括
#包括
#包括
使用名称空间cv;
使用名称空间std;
Mat toGrayscale(输入阵列_src){
Mat src=_src.getMat();
//只允许一个通道
如果(src.channels()!=1)
CV_错误(CV_StsBadArg,“仅支持具有一个通道的矩阵”);
//创建并返回标准化图像
Mat-dst;
cv::normalize(_src,dst,0,255,NORM_MINMAX,cv_8UC1);
返回dst;
}
void read_csv(常量字符串和文件名、向量和图像、向量和标签、字符分隔符=“;”){
std::ifstream文件(filename.c_str(),ifstream::in);
如果(!文件)
抛出std::exception();
字符串行、路径、类标签;
while(getline(文件,行)){
细度(线);
getline(路径、分隔符);
getline(名称、类别标签);
图像。推回(imread(路径,0));
labels.push_back(atoi(classlabel.c_str());
}
}
int main(int argc,const char*argv[]{
//检查命令行参数
/*如果(argc!=2){
不能为我工作


早些时候,我在项目属性中添加了release和Debug lib。现在,我删除了所有已发布的lib,它可以完美地工作。

当您构建fisherface模型时

Ptr<FaceRecognizer> model = createFisherFaceRecognizer();

这个解决方案对我来说很有效。之前我在项目属性中添加了release和Debug lib。现在我已经删除了所有已发布的lib,它工作得非常完美:-)既然找到了解决方案,您可以将其作为答案发布并接受:)
createFisherFaceRecognizer(int num_components=0, double threshold=DBL_MAX);