如何使用Java缩放图像。（How to scale an image using Java.）

问题描述 (Problem Description)

如何使用Java缩放图像。

解决方案 (Solution)

以下是使用Java缩放图像的程序。

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Size;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
public class ScalingAnImage {
   public static void main(String args[]) { 
      //Loading the OpenCV core library
      System.loadLibrary( Core.NATIVE_LIBRARY_NAME );
      //Reading the Image from the file and storing it in to a Matrix object
      String file = "C:/opencv/logo.jpg";
      Mat src = Imgcodecs.imread(file);
      //Creating an empty matrix to store the result
      Mat dst = new Mat();
      //Scaling the Image
      Imgproc.resize(src, dst, new Size(src.rows()/3, src.rows()/3), 0, 0, 
         Imgproc.INTER_AREA);
      //Writing the image
      Imgcodecs.imwrite("C:/opencv/scale_output.jpg", dst);
      System.out.println("Image Processed");
   }
}

输入 (Input)

输出 (Output)