使用OpenCV 4.1.1和Java进行自动透视校正

import org.opencv.core.*;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;

public class PerspectiveCorrection {
    static {
        // 加载OpenCV本地库
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    }

    public static void main(String[] args) {
        // 读取输入图像
        Mat src = Imgcodecs.imread("input.jpg");
        if (src.empty()) {
            System.out.println("无法读取输入图像");
            return;
        }

        // 定义四个源点（图像中的矩形角点）
        Point2f srcPoints[] = new Point2f[4];
        srcPoints[0] = new Point2f(50, 50);
        srcPoints[1] = new Point2f(200, 50);
        srcPoints[2] = new Point2f(50, 200);
        srcPoints[3] = new Point2f(200, 200);

        // 定义四个目标点（校正后的矩形角点）
        Point2f dstPoints[] = new Point2f[4];
        dstPoints[0] = new Point2f(0, 0);
        dstPoints[1] = new Point2f(src.width() - 1, 0);
        dstPoints[2] = new Point2f(0, src.height() - 1);
        dstPoints[3] = new Point2f(src.width() - 1, src.height() - 1);

        // 计算透视变换矩阵
        Mat perspectiveTransform = Imgproc.getPerspectiveTransform(srcPoints, dstPoints);

        // 应用透视变换
        Mat dst = new Mat();
        Imgproc.warpPerspective(src, dst, perspectiveTransform, new Size(src.width(), src.height()));

        // 保存输出图像
        Imgcodecs.imwrite("output.jpg", dst);
    }
}