opencv 3.0和mingw在windows 7下使用AKAZE时出现异常

Exception under opencv 3.0 and mingw under windows 7 when using AKAZE

本文关键字：AKAZE 异常 7下 mingw windows opencv      更新时间：2023-10-16

我想使用AKAZE，它集成在OpenCV 3.0中。为此，我测试了以下代码:

#include <opencv2/features2d.hpp> 
#include <opencv2/imgcodecs.hpp>
#include <opencv2/opencv.hpp>
#include <vector>
#include <iostream>
#include <qcoreapplication.h>
#include <QDebug>
using namespace std;
using namespace cv;
 const float inlier_threshold = 2.5f; // Distance threshold to identify inliers
 const float nn_match_ratio = 0.8f;   // Nearest neighbor matching ratio
int main(int argc, char *argv[])
{
 QCoreApplication a(argc, argv);

Mat img1 = cv::imread("img1.jpg",IMREAD_GRAYSCALE);
Mat img2 = imread("img2.jpg", IMREAD_GRAYSCALE);
Mat homography;
FileStorage fs("H1to3p.xml", FileStorage::READ);
fs.getFirstTopLevelNode() >> homography;
vector<KeyPoint> kpts1, kpts2;
Mat desc1, desc2;
Ptr<AKAZE> akaze = AKAZE::create();
//ERROR after detectAndCompute(...)
akaze->detectAndCompute(img1, noArray(), kpts1, desc1);
akaze->detectAndCompute(img2, noArray(), kpts2, desc2);
BFMatcher matcher(NORM_HAMMING);
vector< vector<DMatch> > nn_matches;
matcher.knnMatch(desc1, desc2, nn_matches, 2);
vector<KeyPoint> matched1, matched2, inliers1, inliers2;
vector<DMatch> good_matches;
for(size_t i = 0; i < nn_matches.size(); i++) {
    DMatch first = nn_matches[i][0];
    float dist1 = nn_matches[i][0].distance;
    float dist2 = nn_matches[i][1].distance;
    if(dist1 < nn_match_ratio * dist2) {
        matched1.push_back(kpts1[first.queryIdx]);
        matched2.push_back(kpts2[first.trainIdx]);
    }
}
for(unsigned i = 0; i < matched1.size(); i++) {
    Mat col = Mat::ones(3, 1, CV_64F);
    col.at<double>(0) = matched1[i].pt.x;
    col.at<double>(1) = matched1[i].pt.y;
    col = homography * col;
    col /= col.at<double>(2);
    double dist = sqrt( pow(col.at<double>(0) - matched2[i].pt.x, 2) +
                        pow(col.at<double>(1) - matched2[i].pt.y, 2));
    if(dist < inlier_threshold) {
        int new_i = static_cast<int>(inliers1.size());
        inliers1.push_back(matched1[i]);
        inliers2.push_back(matched2[i]);
        good_matches.push_back(DMatch(new_i, new_i, 0));
    }
}
Mat res;
drawMatches(img1, inliers1, img2, inliers2, good_matches, res);
imwrite("res.png", res);
double inlier_ratio = inliers1.size() * 1.0 / matched1.size();
cout << "A-KAZE Matching Results" << endl;
cout << "*******************************" << endl;
cout << "# Keypoints 1:                        t" << kpts1.size() << endl;
cout << "# Keypoints 2:                        t" << kpts2.size() << endl;
cout << "# Matches:                            t" << matched1.size() << endl;
cout << "# Inliers:                            t" << inliers1.size() << endl;
cout << "# Inliers Ratio:                      t" << inlier_ratio << endl;
cout << endl;
    return a.exec();

}

在akaze->detectAndCompute(img1, noArray(), kpts1, desc1);行之后抛出了以下异常:

 OpenCV Error: Insufficient memory (Failed to allocate 72485160 bytes) in OutOfMemoryError, file C:opencvsourcesmodulescoresrcalloc.cpp, line 52.
 OpenCV Error: Assertion failed (u != 0) in create, file C:opencvsourcesmodulescoresrcmatrix.cpp, line 411 terminate called after throwing an instance of 'cv::Exception'
 what():  C:opencvsourcesmodulescoresrcmatrix.cpp:411: error: (-215) u != 0

我已经在Windows 7下编译了OpenCV mitmingw4.92。

有人回答吗?

谢谢

更多的是评论，而不是回答，但我无法评论。

作为错误状态，您似乎在处理A-KAZE检测时内存不足。在我的一个测试中(尽管我的图像是4160x2340)，一个接一个地处理三个检测模块很容易占用大约7-8 GB的内存。您的图像的分辨率是多少，您有多少RAM ?

同样，如果您将此应用程序编译为32位，它将无法分配超过4 GB(如果您自己在32位操作系统上，则为2 GB)。您使用的是32位还是64位，如果是后者，您是否将其编译为64位应用程序?一种可能的解决方案是调整图像的大小，使其具有更少的像素并需要更少的内存:

cv::resize(sourceImage, destinationImage, Size(), 0.5, 0.5, interpolation); // Halves the resolution

但这是最后的手段，因为更高的分辨率意味着更多的特征和精度。

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