I have a java.awt.Image that I need to add CCITT T.6 compression and convert to a TIFF byte array. I have seen some examples of using TIFFImageWriteParam and other classes from the javax.imageio package but I can’t find a complete example going all the way from Image to byte array.
Here is what I have so far beginning with a java.awt.Image obtained from scanning. This works just fine to generate a byte array of a TIFF, but I need to find a way, using TIFFImageWriteParam or some other means, to compress the TIFF prior to processing it as a byte array:
thisImage = ... a java.awt.Image from a scanner
if(thisImage!=null){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BufferedImage bimg = new BufferedImage(thisImage.getWidth(null),thisImage.getHeight(null), BufferedImage.TYPE_BYTE_BINARY);
bimg.createGraphics().drawImage(thisImage, 0, 0, null);
try {
ImageIO.write(bimg, "tiff", baos);
} catch (Exception e) {
e.printStackTrace();
}
thisByteArray = baos.toByteArray();
...
Any help would be appreciated.
I found a solution thanks to: this thread.
Here is what I ended up doing that solved my issue:
thisImage = thisImage = ... a java.awt.Image from a scanner
if(thisImage!=null){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
boolean foundWriter = false;
BufferedImage bimg = new BufferedImage(thisImage.getWidth(null),thisImage.getHeight(null), BufferedImage.TYPE_BYTE_BINARY);
bimg.createGraphics().drawImage(thisImage, 0, 0, null);
for(Iterator<ImageWriter> writerIter = ImageIO.getImageWritersByFormatName("tif"); writerIter.hasNext() && !foundWriter;) {
foundWriter = true;
ImageWriter writer = (ImageWriter)writerIter.next();
writer.setOutput(ios);
TIFFImageWriteParam writeParam = (TIFFImageWriteParam)writer.getDefaultWriteParam();
writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
writeParam.setCompressionType("CCITT T.6");
writer.prepareWriteSequence(null);
ImageTypeSpecifier spec = ImageTypeSpecifier.createFromRenderedImage(bimg);
javax.imageio.metadata.IIOMetadata metadata = writer.getDefaultImageMetadata(spec, writeParam);
IIOImage iioImage = new IIOImage(bimg, null, metadata);
writer.writeToSequence(iioImage, writeParam);
bimg.flush();
writer.endWriteSequence();
ios.flush();
writer.dispose();
ios.close();
thisByteArray = baos.toByteArray();
baos.close();
}
}
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 have an image stored as a byte array. Regardless how large the size, I want to always resize it down to 100x100 pixels.
I am trying to convert the byte array into a bufferedimage, resize and save it back as a bytearray. But with the following code, the images no longer appear on my page.
byte[] pict; // this array contains the image
BufferedImage bufferedImage;
ByteArrayInputStream bais = new ByteArrayInputStream(pict);
try {
bufferedImage = ImageIO.read(bais);
bufferedImage = Scalr.resize(bufferedImage, 100);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write( bufferedImage, "jpg", baos );
baos.flush();
pict = baos.toByteArray();
baos.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
OutputStream o = response.getOutputStream();
o.write(pict);
Do it this way instead:
Image tmpImage = ImageIO.read(bais);
Image scaled = tmpImage.getScaledInstance(100, 100, Image.SCALE_SMOOTH);
Then, to convert to a byte array, convert the image into a bufferedimage and then that into the byte array:
BufferedImage buffered = ((ToolkitImage) scaled).getBufferedImage();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(buffered, "jpg", baos);
baos.flush();
pict = baos.toByteArray();
baos.close();
I am trying to convert a 8 bit gray scale image byte array to jpg image format in java.
static byte[] bytes = new byte[]{126, 126, 127, -128};
public static void main(String[] args) throws IOException {
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
Iterator<?> readers = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = (ImageReader) readers.next();
Object source = bis;
ImageInputStream iis = ImageIO.createImageInputStream(source);
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
Image image = reader.read(0, param);
BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_BYTE_GRAY);
Graphics2D g2 = bufferedImage.createGraphics();
g2.drawImage(image, null, null);
File imageFile = new File("C:\\newrose3.jpg");
ImageIO.write(bufferedImage, "jpg", imageFile);
System.out.println(imageFile.getPath());
}
I have bytes having image data and I want to convert it into readable image format in java.
Assuming bytes is supposed to be pixel data, you should create an image from those bytes, then write it out as JPEG.
Something like:
// Create an image type grayscale
BufferedImage image = new BufferedImage(2, 2, BufferedImage.TYPE_BYTE_GRAY);
// Get the backing pixels, and copy into it
byte[] data = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
System.arraycopy(bytes, 0, data, 0, bytes.length);
// Write it out:
ImageIO.write(image, "jpg", new File("yourPathHere");
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);
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
}