DescriptorExtractor类在opencv 4.1.0 for Android中不可用

import org.opencv.core.Mat;
import org.opencv.features2d.AKAZE;
import org.opencv.features2d.KeyPoint;
import org.opencv.core.MatOfKeyPoint;
import org.opencv.core.MatOfFloat;

// 加载OpenCV库
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

// 创建AKAZE对象
AKAZE akaze = AKAZE.create();

// 加载图像
Mat image = Imgcodecs.imread("path_to_image");

// 检测和计算特征描述符
MatOfKeyPoint keypoints = new MatOfKeyPoint();
Mat descriptors = new MatOfFloat();
akaze.detectAndCompute(image, new Mat(), keypoints, descriptors);

// 打印特征点数量
System.out.println("Number of keypoints: " + keypoints.size().height);

// 打印特征描述符维度
System.out.println("Descriptor dimensions: " + descriptors.size().width);