import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.objdetect.CascadeClassifier;
public class ImageRecognition {
public static void main(String[] args) {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
// 加载人脸检测器
CascadeClassifier faceDetector = new CascadeClassifier("haarcascade_frontalface_default.xml");
// 读取图像
Mat image = Imgcodecs.imread("input.jpg");
Mat grayImage = new Mat();
Imgproc.cvtColor(image, grayImage, Imgproc.COLOR_BGR2GRAY);
// 检测人脸
MatOfRect faceDetections = new MatOfRect();
faceDetector.detectMultiScale(grayImage, faceDetections);
// 在图像上绘制人脸框
for (Rect rect : faceDetections.toArray()) {
Imgproc.rectangle(image, new Point(rect.x, rect.y),
new Point(rect.x + rect.width, rect.y + rect.height),
new Scalar(0, 255, 0), 3);
}
// 保存检测结果
Imgcodecs.imwrite("output.jpg", image);
}
}