我试图在 Android 应用程序中使用 ORB 功能，并创建一个项目。当我使用 BruteForceMatcher 并编写代码：dist=matches[i].distance，我的 IDE 通知我“无法解析字段'距离'”。为什么会这样？
#include <jni.h>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/features2d/features2d.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/legacy/legacy.hpp>
#include <iostream>
#include <vector>
using namespace std;
using namespace cv;
extern "C" {
JNIEXPORT int JNICALL Java_org_opencv_samples_tutorial2_Tuturial2Activity_CompareFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba);
JNIEXPORT int JNICALL Java_org_opencv_samples_tutorial2_Tuturial2Activity_CompareFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba)
{
char img_filename1[]="/sdcard/src.jpg";
char img_filename2[]="/sdcard/demo.jpg";
Mat src1,src2;
src1=imread(img_filename1,CV_LOAD_IMAGE_GRAYSCALE);
src2=imread(img_filename2,CV_LOAD_IMAGE_GRAYSCALE);
ORB orb;
vector<KeyPoint> keys1,keys2;
Mat descriptors1,descriptors2;
orb(src1,Mat(),keys1,descriptors1);
orb(src2,Mat(),keys2,descriptors2);
BruteForceMatcher<HammingLUT> matcher;
vector<DMatch> matches;
matcher.match(descriptors1,descriptors2,matches);
double max_dist=0; double min_dist=255;
//--Quick calculation of max and min distances between keypoints
for (int i=0;i<descriptors1.rows;i++)
{
double dist=matches[i].distance;
}
return 0;
}
}