代码案例：package com.what21.opencv.demo;

import java.util.List;

import org.opencv.core.Core;

import org.opencv.core.CvType;

import org.opencv.core.Mat;

import org.opencv.core.Point;

import org.opencv.imgcodecs.Imgcodecs;

import org.opencv.imgproc.Imgproc;

import org.opencv.utils.Converters;

public class Perspective {

public static void main(String[] args) {

System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

Mat src=Imgcodecs.imread("D:/ShareData/internet.jpg");

//读取图像到矩阵中,取灰度图像

if(src.empty()){

return ;

}

try{

int xMargin,yMargin;

int x0=src.cols()/4;

int x1=(src.cols()/4)*3;

int y0=src.cols()/4;

int y1=(src.cols()/4)*3;

Mat dst=new Mat();

List listSrcs=java.util.Arrays.asList(new Point(x0,y0),new Point(x0,y1),new Point(x1,y1),new Point(x1,y0));

Mat srcPoints=Converters.vector_Point_to_Mat(listSrcs,CvType.CV_32F);

xMargin=src.cols()/10;

yMargin=src.rows()/10;

List listDsts=java.util.Arrays.asList(new Point(x0+xMargin,y0+yMargin),listSrcs.get(1),listSrcs.get(2),new Point(x1-xMargin,y0+yMargin));

Mat dstPoints=Converters.vector_Point_to_Mat(listDsts,CvType.CV_32F);

Mat perspectiveMmat=Imgproc.getPerspectiveTransform(srcPoints, dstPoints);

Imgproc.warpPerspective(src, dst, perspectiveMmat, src.size(),Imgproc.INTER_LINEAR);

Imgcodecs.imwrite("D:/ShareData/internet.dst0.jpg",dst);

xMargin=src.cols()/8;

yMargin=src.cols()/8;

listDsts.set(0, listSrcs.get(0));

listDsts.set(1, listSrcs.get(1));

listDsts.set(2, new Point(x1-xMargin,y1-yMargin));

listDsts.set(3, new Point(x1-xMargin,y0-yMargin));

dstPoints=Converters.vector_Point_to_Mat(listDsts,CvType.CV_32F);

perspectiveMmat=Imgproc.getPerspectiveTransform(srcPoints, dstPoints);

Imgproc.warpPerspective(src, dst, perspectiveMmat, src.size(),Imgproc.INTER_LINEAR);

Imgcodecs.imwrite("D:/ShareData/internet.dst1.jpg", dst);

xMargin=src.cols()/6;

yMargin=src.cols()/6;

listDsts.set(0, new Point(x0+xMargin,y0+yMargin));

listDsts.set(1, listSrcs.get(1));

listDsts.set(2, new Point(x1-xMargin,y1-yMargin));

listDsts.set(3, listSrcs.get(3));

dstPoints=Converters.vector_Point_to_Mat(listDsts,CvType.CV_32F);

perspectiveMmat=Imgproc.getPerspectiveTransform(srcPoints, dstPoints);

Imgproc.warpPerspective(src, dst, perspectiveMmat, src.size(),Imgproc.INTER_LINEAR);

Imgcodecs.imwrite("D:/ShareData/internet.dst2.jpg", dst);

}catch(Exception e){

e.printStackTrace();

}

}

}