I have to convert image URL into an image. For that I tried following coding for convert base64 to an image. While on debugging the code "Bufferedimage image" is always null after ByteArrayInputStream bis=new ByteArrayInputStream(imagebyte). What can I do?
String imageStr = request.getParameter("imgURL");
BufferedImage image = null;
try {
BASE64Decoder decoder = new BASE64Decoder();
byte[] imageByte = decoder.decodeBuffer(imageStr);
ByteArrayInputStream bis = new ByteArrayInputStream(imageByte);
image = ImageIO.read(bis);
File outputfile = new File("E:\\saved.png");
ImageIO.write(image, "png", outputfile);
bis.close();
} catch (Exception e) {
e.printStackTrace();
}
I have to convert image URL into an image.
If that is your only requirement, then will this do?
URL url = new URL("www.example.com/image.png");
BufferedImage image = ImageIO.read(url);
File outputfile = new File("E:\\saved.png");
ImageIO.write(image, "png", outputfile);
Related
we are getting the exception while reading the image,but i have an image in location path.Please suggest us?
byte photoContentByte[] = null;
BufferedImage originalImage = ImageIO.read(new File("D:/xyz/Repository/1234567890.tif"));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(originalImage, "jpeg", baos);
baos.flush();
photoContentByte = baos.toByteArray();
baos.close();
Try this:
BufferedImage originalImage = ImageIO.read(new FileInputStream("D:/xyz/Repository/1234567890.tif"));
EDIT:
As resolved in comments, you have a typo in file extension. It should be
BufferedImage originalImage = ImageIO.read(new File("D:/xyz/Repository/1234567890.tiff"));
i.e., the file extension needs to be tiff and not tif
i created a QR generator in java.I tested my application using FileOutPutStream.So it worked properly,now i need to get the generated QR image to a jLabel before save,so how to do this.please help me??
this is my code:
ByteArrayOutputStream out = QRCode.from("Hello World").to(ImageType.PNG).stream();
ByteArrayOutputStream webout = QRCode.from("http://viralpatel.net").to(ImageType.PNG).stream();
try {
FileOutputStream fout = new FileOutputStream(new File("D:\\QR_Code.JPG"));
BufferedImage image= ImageIO.read(new FileOutputStream(fout)));
fout.write(out.toByteArray());
fout.flush();
fout.close();
} catch (Exception e){
}
A ByteArrayOutputStream is used to write to a final byte array.
A ByteArrayInputStream allows to read from an initial byte array.
So:
ByteArrayOutputStream out = ...
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
BufferedImage image= ImageIO.read(in);
I'm designing a program that stores geography data on the JavaFX platform, and whenever I convert an image from a JavaFX Image into a BufferedImage then a ByteArray (for the purpose of serialization) before converting to a Buffered Image and then JavaFX Image again, it gets slightly corrupt. Here's the code I'm using to convert back and forth:
private byte [] loadImageData (Image image){
try{
//creating a byte array output stream from the Image
BufferedImage bi = SwingFXUtils.fromFXImage(image, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream(1000);
ImageIO.write(bi, "png", baos );
baos.flush();
byte[] imageData = baos.toByteArray();
baos.close();
return imageData;
}catch (Exception e){
e.printStackTrace();
}
}
public Image restoreMapData (byte[] data){
try{
//converting back to an image
InputStream in = new ByteArrayInputStream(data);
BufferedImage bi = ImageIO.read(in);
return SwingFXUtils.toFXImage(bi, null);
}catch(Exception e){
e.printStackTrace();
return null;
}
}
Could there be an error elsewhere? I've attached a corrupted and un-corrupt picture of the data.
I also noticed that if I convert to BufferedImage with a type TYPE_INT_ARGB it greatly diminishes the effect.
I need to obtain the pixel data from a BufferedImage so I can recreate the image from the data. I looked into Raster, but that did not seem to contain the information I need. How can I obtain data from a BufferedImage so I can recreate the image without needing the original file?
You should check out the answers to this question
Java - get pixel array from image
One way to do it is to use
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(originalImage, "jpg", baos);
baos.flush();
byte[] imageBytes = baos.toByteArray();
baos.close();
Now when you want to create a new BufferedImage from the data you use
ByteArrayInputStream bais = new ByteArrayInputStream(imageBytes);
BufferedImage newImage = null;
try {
newImage = ImageIO.read(bais);
} catch (IOException e) {
// handle exception
}
I have a png file and tried to convert it to jpeg. But the resulting image has wrong colors with very big areas of pink. This is my code:
BufferedImage image = null
BufferedImage imageRGB = null
image = ImageIO.read(new ByteArrayInputStream(imageBytesPng))
imageRGB = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB)
imageRGB.setData(image.getData())
ByteArrayOutputStream baos=new ByteArrayOutputStream()
ImageIO.write(imageRGB, "jpeg", baos)
baos.flush()
def outImage = baos.toByteArray()
baos.close()
return outImage
What can I change to make the image colors apear as in the png file?
InputStream pngInputStream = ...
OutputStream jpgOutputStream = ...
BufferedImage image = ImageIO.read(pngInputStream));
ImageIO.write(image, "jpeg", jpgOutputStream);
Try this all the best..
import javax.media.jai.*;
public class jai_png_jpg
{
public static void main(String[] args)throws Exception
{
String filename="input_png.png";
//Read input PNG as a PlanarImage file
PlanarImage inputfile = JAI.create("fileload", filename);
//write output in JPG Format
JAI.create("filestore",inputfile,"jai_jpg_output.jpg","JPEG"); } }