如何使用OpenCV Java压缩映像并存储到特定文件夹

Question

嗨我想压缩并将压缩图像存储到文件夹。所以我用下面的代码，

import java.io.*; 
import java.util.*; 
import java.awt.image.*; 

import javax.imageio.*; 
import javax.imageio.stream.ImageOutputStream; 

public class Compression { 

    public static void main(String[] args) throws IOException { 

     String dc = "C:\\Users\\admin\\Desktop\\RFI\\DC\\1_1_c.jpg"; 
     String dr = "C:\\Users\\admin\\Desktop\\RFI\\DR"; 

     File file = new File(dc); 
     BufferedImage image = ImageIO.read(file); 
     OutputStream os =new FileOutputStream(new File(dr)); 
     Iterator<ImageWriter>writers = ImageIO.getImageWritersByFormatName("jpg"); 
     ImageWriter writer = (ImageWriter) writers.next(); 

     ImageOutputStream ios = ImageIO.createImageOutputStream(os); 
     writer.setOutput(ios); 

     ImageWriteParam param = writer.getDefaultWriteParam(); 

     param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 
     param.setCompressionQuality(0.05f); 
     writer.write(null, new IIOImage(image, null, null), param); 

     os.close(); 
     ios.close(); 
     writer.dispose(); 
    } 
} 

但我没有得到压缩图像。只有得到下面的错误在控制台上

Exception in thread "main" javax.imageio.IIOException: Can't read input file! 
    at javax.imageio.ImageIO.read(ImageIO.java:1301) 
    at com.opencv.Compression.main(Compression.java:18) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) 

请给我建议任何想法....

Answer 1

这就值得评论比答案多，但由于我的名声是如此之低，我不能发表评论，我不得不写它作为答案。

您是否尝试了解您遇到的错误？调用堆栈非常清晰。您在线路BufferedImage image = ImageIO.read(file);处有错误。该程序无法找到您的图像。你确定String dc = "C:\\Users\\admin\\Desktop\\RFI\\DC\\1_1_c.jpg";中指定的图像文件确实存在吗？