height of the image.

[programmer_007]

what is wrong with the code .. i want to read image and display its height..
May be sumthing wrong with the path of the image ..m using ubantu.

import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.*;



public class Test1 {
	int height;
	public void getHeight()
	{
		BufferedImage img = null;
		try{
			img = ImageIO.read(new File("/home/sandeep/Pictures/images.jpg"));
			height = img.getHeight();
			}
		catch(IOException e){
			e.printStackTrace();
			
		}
		
	}
	public static void main()
	{
		Test1 t = new Test1();
		t.getHeight();
	}

}

exception generated are :

at javax.imageio.ImageIO.read(ImageIO.java:1275)
at ReadImage.<init>(ReadImage.java:14)
at ReadImage.main(ReadImage.java:24)

[Tolls]

You managed to miss out telling us the actual exception.

[hardwired]

Paths can be tricky. Try opening things up a bit:

public class Test {
    private int getHeight() {
        int height = -1;
        String path = "/home/sandeep/Pictures/images.jpg";
        try{
            File file = new File(path);
            URI uri = file.toURI();
            System.out.println("uri = " + uri);
            URL url = uri.toURL();
            System.out.println("url = " + url);
            BufferedImage img = ImageIO.read(file);
            height = img.getHeight();
        } catch(IOException e) {
            System.out.println(e.getMessage());
        }
        return height;
    }

    public static void main(String[] args) {
        System.out.println("height = " + new Test().getHeight());
    }
}

[Tolls]

e.printStacktrace()!

What is it with e.getMessage()?
It's next to useless for debugging...

[programmer_007]

nothing worked !! and yah sorry 4 not answering back to the thread ..

[programmer_007]

You managed to miss out telling us the actual exception.

Actual Exception is the code is unable to read the image file ...

[Tolls]

Um, no.
You gave us a stacktrace, but you missed the first line of it which is the exception that was thrown.

[programmer_007]

okay the exception was as below:

javax.imageio.IIOException: Can't read input file!
at javax.imageio.ImageIO.read(ImageIO.java:1275)
at Test.getHeight(Test.java:12)
at Test.main(Test.java:28)

...

i also want to detect the file format of the image .. can u suggest some code?

[Tolls]

There you go then.
It can't read the file.
This exception usually has another exception wrapped in it...is this the full stack trace, or is there (possibly) a FileNotFoundException in there as well?

[programmer_007]

yeah .. this is the full stack trace ...there is nothing like FIleNotFoundException..

[programmer_007]

hey Tolls.
i did some R & D on this stuff.
Actually there is something wrong with the file itself .. when i put some another jpeg file in that directory .. and Violla.. it worked..
Now i can read the height, width ,format of the file.. after playing with the code ..

import java.io.*;
import java.net.*;
import java.util.Iterator;
import java.awt.image.*;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

public class Test {
	int height;
	int width;
	String formatName;
	
	//CONSTRUCTOR OF THE CLASS Test.
	public Test()
	{
		BufferedImage img = null;
		try{
			File file = new File("/home/sandeep/TestCodes/test/bin/j.jpg");
			img = ImageIO.read(file);
			
			height = img.getHeight();
			width = img.getWidth();
			//System.out.println(height);
			//System.out.println(img.getWidth());
			//System.out.println(img.getType());
		    formatName = getFormatName(file);
			//System.out.println(formatName);
			}
		catch(IOException e){
			e.printStackTrace();
			}
		
	}//CONSTRUCTOR ENDS
	
	//FUNCTION TO GET FORMAT NAME OF THE IMAGE FILE.
	private static String getFormatName(Object o) {
	    try {
	        // Create an image input stream on the image
	        ImageInputStream iis = ImageIO.createImageInputStream(o);

	        // Find all image readers that recognize the image format
	        Iterator iter = ImageIO.getImageReaders(iis);
	        if (!iter.hasNext()) {
	            // No readers found
	            return null;
	        }

	        // Use the first reader
	        ImageReader reader = (ImageReader)iter.next();

	        // Close stream
	        iis.close();

	        // Return the format name
	        return reader.getFormatName();
	    } catch (IOException e) {
	    }
	    // The image could not be read
	    return null;
	}
	//FUNCTION ENDS.
	
	
	
	public static void main(String []args)
	{
		Test t = new Test();
		System.out.println("Height of the Image : "+t.height);
		System.out.println("Width of the Image  : "+t.width);
		System.out.println("Format of the Image : "+t.formatName);
	}

}

[programmer_007]

I am working on a project to extract text(Handwritten + printed) from images , jpeg .. and thus playing with the API's to explore ..
I need some good guidance and support from the forum... can u point some way .. in Java

[Tolls]

OK.
So the jpg file was corrupt, as far as ImageIO was concerned.

For text identification do a search on the forums. That has been asked a few times over the past year at least. One or two of them have some possible links, or advice.

[programmer_007]

Arrite .... lets see where it goes !! already googled a lot ..