The conversion from byte[] to BufferedImage is involved the use of InputStream and ImageIO.read as following :

InputStream in = new ByteArrayInputStream(imageInByte);
BufferedImage bImageFromConvert = ImageIO.read(in);

The following example will read an image file named “darksouls.jpg“, convert it into byte array, and then reuse the converted byte array, and convert it back to a new BufferedImage, and save it back into a new name “new-darksouls.jpg“.

package com.mkyong.image;
 
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;
 
public class ImageTest {
 
	public static void main(String[] args) {
 
		try {
 
			byte[] imageInByte;
			BufferedImage originalImage = ImageIO.read(new File(
					"c:/darksouls.jpg"));
 
			// convert BufferedImage to byte array
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			ImageIO.write(originalImage, "jpg", baos);
			baos.flush();
			imageInByte = baos.toByteArray();
			baos.close();
 
			// convert byte array back to BufferedImage
			InputStream in = new ByteArrayInputStream(imageInByte);
			BufferedImage bImageFromConvert = ImageIO.read(in);
 
			ImageIO.write(bImageFromConvert, "jpg", new File(
					"c:/new-darksouls.jpg"));
 
		} catch (IOException e) {
			System.out.println(e.getMessage());
		}
	}
}
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