Image Conversion with Byte Arrays
I'm trying to read in a byte[] for JPG, PNG, BMP, and GIF files which will then be converted to a .TIFF file so it can be printed on Post Script printers.
Technically I have it working BUT the catch is that it physically needs to create the file. I'd like to have it all done in memmory and not have to actaully have a physical file created.
I have been trying many different things with the JAI.create function. Near as I can see so far that only creates a RenderedImage which then creats a file even if I use "stream" inscreat off "filename".
Any suggestions would be appreciated.
Thanks.
I got it figured out. It does make the TIFF a little bit larger but that's ok.
RenderedOp src = JAI.create("stream", new com.sun.media.jai.codec.ByteArraySeekableStream(image));
ByteArrayOutputStream out = new ByteArrayOutputStream();
JAI.create("encode", src, out, "TIFF", null);
return out.toByteArray();
Similar Messages
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How to convert a Image object to byte Array?
Who can tell me, how to convert Image object to byte Array?
Example:
public byte[] convertImage(Image img) {
byte[] b = new byte...........
return b;Hello,
any way would suit me, I just need a way to convert Image or BufferedImage to a byte[], so that I can save them. Actually I need to save both jpg and gif files without using any 3rd party classes. Please help me out.
thanx and best wishes -
Display an object of Image type or Byte Array
Hi, lets say i got an image stored in the Image format or byte[]. How can i make it display the image on the screen by taking the values in byte array or Image field?
Thanks rahul,
The thing is, i am generating a chart in a servlet
and setting the image in the form of a byte [] to the
view bean ( which is binded to the jsp, springs
framework ). The servlet would return the view bean
to the jsp and in the jsp, i am suppose to print this
byte array so as to give me the image..
I hope this makes sense.. pls help me ou!Well letme see if i got tht right or not,
you are trying to call Your MODEL (Business layer / Spring Container) from a servlet and you are expressing that logic in form of chart (Image) and trying to save it as a byte array in a view bean and you want to print /display that as an image in a jsp (After Servlet fwd / redirect action) which includes other data using a ViewBean.
If this is the case...
As the forwaded JSP can include both image and Textual (hypertext too)..we can try a work around hear...Lets dedicate a Servlet which retreives byte [] from a view bean and gives us an image output. hear is an example and this could be a way.
Prior to that i'm trying to make few assumptions here....
1).The chart image which we are trying to express would of format JPEG.
2).we are trying to take help of<img> tag to display the image from the image generating servlet.
here is my approach....
ViewBean.java:
============
public class ViewBean implements serializable{
byte piechart[];
byte barchart[];
byte chart3D[];
public ViewBean(){
public byte[] getPieChart(){
return(this.piechart);
public byte[] getBarChart(){
return(this.barchart);
public byte[] get3DChart(){
return(this.chart3D);
public void setPieChart(byte piechart[]){
this.piechart = piechart;
public void setBarChart(byte barchart[]){
this.barchart = barchart;
public void set3DChart(byte chart3D[]){
this.chart3D = chart3D;
}ControllerServlet.java:
=================
(This could also be an ActionClass(Ref Struts) a Backing Bean(Ref JSF) or anything which stays at the Controller Layer)
public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
/* There are few different implementations of getting BeanFactory Resource
In,the below example i have used XmlBeanFactory Object to create an instance of (Spring) BeanFactory */
BeanFactory factory =
new XmlBeanFactory(new FileInputStream("SpringResource.xml"));
//write a Util Logic in your Implementation class using JFreeChart (or some open source chart library) and express the images by returning a byte[]
ChartService chartService =
(GreetingService) factory.getBean("chartService");
ViewBean vb = new ViewBean();
vb.setPieChart(chartService.generatePieChart(request.getParameter("<someparam>"));
vb.setBarChart(chartService.generateBarChart(request.getParameter("<someparam1>"));
vb.set3DChart(chartService.generate3DChart(request.getParameter("<someparam2>"));
chartService = null;
HttpSession session = request.getSession(false);
session.setAttribute("ViewBean",vb);
response.sendRedirect("jsp/DisplayReports.jsp");
}DisplayReports.jsp :
================
<%@ page language="java" %>
<html>
<head>
<title>reports</title>
</head>
<body>
<h1 align="center">Pie Chart </h1>
<center><img src="ImageServlet?req=1" /></center>
<h1 align="center">Bar Chart </h1>
<center><img src="ImageServlet?req=2" /></center>
<h1 align="center">3D Chart</h1>
<center><img src="ImageServlet?req=3" /></center>
</body>
</html>ImageServlet.java
==============
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
byte buffer[];
HttpSession session = request.getSession(false);
ViewBean vb = (ViewBean) session.getAttribute("ViewBean");
String req = request.getParameter("req");
if(req.equals("1") == true)
buffer = vb.getPieChart();
else if(req.equals("2") == true)
buffer = vb.getBarChart();
else if(req.equals("3") == true)
buffer = vb.get3DChart();
JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(new ByteArrayInputStream(buffer));
BufferedImage image =decoder.decodeAsBufferedImage() ;
response.setContentType("image/jpeg");
// Send back image
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(sos);
encoder.encode(image);
}Note: Through ImageServlet is a Servlet i would categorise it under presentation layer rather to be a part of Controller and added to it all this could be easily relaced by a reporting(BI) server like JasperServer,Pentaho,Actuate................
Hope the stated implementation had given some idea to you....
However,If you want to further look into similar implementations take a look at
http://www.swiftchart.com/exampleapp.htm#e5
which i believe to be a wonderful tutor for such implementations...
However, there are many simple (Open) solutions to the stated problem.. if you are Using MyFaces along with spring... i would recommend usage of JSF Chart Tag which is very simple to use all it requires need is to write a chart Object generating methos inside our backing bean.
For further reference have a look at the below links
http://www.jroller.com/page/cagataycivici?entry=acegi_jsf_components_hit_the
http://jsf-comp.sourceforge.net/components/chartcreator/index.html
NOTE:I've tried it personally using MyFaces it was working gr8 but i had a hardtime on deploying my appln on a Portal Server(Liferay).If you find a workaround i'd be glad to know about it.
& there are many BI Open Source Server Appls that can take care of this work too.(Maintainace wud be a tough ask when we go for this)
For, the design perspective had i've been ur PM i wud have choose BI Server if it was corporate web appln on which we work on.
Hope this might be of some help :)
REGARDS,
RaHuL -
How to convert an Image to a byte array?
I want to make a screenshot and then convert the image to a byte of arrays so I can send it through a BufferedOutputStream.
try
robot = new Robot();
screenshot = robot.createScreenCapture(new Rectangle(500,500));
imageFile = new File("image.png");
ImageInputStream iis = ImageIO.createImageInputStream(screenshot);
byte[] data = new byte[1024];
byte[] tmp = new byte[0];
byte[] myArrayImage = new byte[0];
int len = 0;
int total = 0;
while((len = iis.read(data)) != -1 ) // LINE 52 --- EXCEPTION CATCHED HERE
total += len;
tmp = myArrayImage;
myArrayImage = new byte[total];
System.arraycopy(tmp,0,myArrayImage,0,tmp.length);
System.arraycopy(data,0,myArrayImage,tmp.length,len);
ios.close();I get this exception while running:
Exception in thread "Thread-0" java.lang.NullPointerException
at Server.run(Server.java:52)
at java.lang.Thread.run(Unknown Source)Fixed that. I got a new problem.
When I connect to my simple server application that reads the image file, converts it to an array of bytes and sends it back, the file is created on the client side and it containts data, but I am not able to open the image. I have checked that the image that the server is sending is working. So where is the problem?
The client application recieves the image as following:
public void run()
try
socket = new Socket("127.0.0.1", 2000);
BufferedOutputStream out_file = new BufferedOutputStream(new FileOutputStream("recieved_img.png"));
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
int inputLine;
while((inputLine = in.read()) != -1)
char c = (char)inputLine;
System.out.println(c);
out_file.write(inputLine);
catch(IOException err){ err.printStackTrace(); }
}And the server sends the image like this;
try
socket = server.accept();
in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new BufferedOutputStream(socket.getOutputStream());
out.write(25);
while((inputLine = in.readLine()) != null)
System.out.println(myArrayImage.length);
System.out.println(inputLine);
out.write(myArrayImage); // Send the array of bytes
} -
Converting Image.jpg to byte array
Hi,
How do i convert a image (in any format like .jpeg, .bmp, gif) into a byte array
And also vice versa, converting byte array to image format
Thank youhow about Class.getResourceAsStream(String name).read(byte[] b)?
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Repost: Problem with byte array
i wrote the following code:
public class Test {
byte [] ba = new byte[10];
void print(String s) { System.out.println(s); }
void printInitialValues() {
for (int i=0; i<10; i++)
ba = (byte)0;
//System.arraycopy("asdf".getBytes(), 0, ba, 0, 4);*/
print("byte array " + ba);
public static void main(String[] args) {
Test iv = new Test();
iv.printInitialValues();
}why the output isn't the string of the serial '0', instead, it seems the random output.
when i put the line "System...." to the code, the result is the same.
Can anybody tell me why?
Regards,
JasonYour byte[] is an object of the type Array. Array does
not override toString(), and thus you get the default
Object.toString() behavior. If you want to print out
the array elements, you'll need to iterate through the
array manually.And in 1.5 you can use this:
Arrays.toString(byteArray);/Kaj -
i wrote the following code:
public class Test {
byte [] ba = new byte[10];
void print(String s) { System.out.println(s); }
void printInitialValues() {
for (int i=0; i<10; i++)
ba[i] = (byte)0;
//System.arraycopy("asdf".getBytes(), 0, ba, 0, 4);*/
print("byte array " + ba);
public static void main(String[] args) {
Test iv = new Test();
iv.printInitialValues();
why the output isn't the string of serial '0', instead, it seems the random output.
when i put the line "System...." to the code, the result is the same.
Anybody can tell me why?
Regards,
JasonContinued [url http://forum.java.sun.com/thread.jsp?forum=31&thread=551032&tstart=0&trange=15]here.
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Problem with byte array arguments in webservice method call
I am using JWSDP 1.5 to generate client stubs for a webservice hosted on a Windows 2000 platform.
One of the methods of the webservice contains a byte array argument. When our application calls this method passing the contents of a TIFF file as the byte array, the method is failing. I have discovered that tthe reason for the failure is that the byte array in the SOAP message has been truncated and is missing its terminating tag.
Is this a known problem in JWSDP 1.5? Is there a fix for it? Does JWSDP 1.6 resolve this problem?
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Thanks.Hi,
I am using a servlet to stream image (GIF) to the browser.
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I get the image on the browser. But when I try to see the properties of the image I don't see the type of image. I also don't see the created time, modified time and size of the image. When I do Save As on this image it tries to save it as BMP instead of GIF. Also when I do the print preview I don't see the image in the preview window. When I try to print the web page, it prints everything except this image. I get small cross(image missing) on the printed page.
I would like to know why the image attributes on browser go missing and why can't I print the image?
I would like to add that I am getting the image as the array of bytes from a different application on which I do not have control.
Thanks. -
Deriving color space of an image from a byte array input stream.
I was wondering, is it possible to derive the color space of an image, i.e. RGB, YCC, GRAY by calculating its bytes?
Calculate bytes just means doing operations on the
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the color space.Look at the format specifications...
By the way, do all image file types have different
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How do i covert an image in J2ME into an byte array ?
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throws
ServletException, IOException
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To create images continuously using a byte array while streaming video
Can someone please help me in creating images from a byte array continuously which is required while streaming video on implementation of RTP?
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Package javax.imageio -
I've got a problem with byte array. It needs to be initialized f.e.
byte[] data = new byte[100];However, I'm gonna read input stream to that array
is.read(data);and input stream might be longer than expected f.e. 1000 bytes.
What can I do to predict the length of byte[] or avoid NullPointerException
public void connect() throws IOException {SocketConnection client = (SocketConnection) Connector.open("socket://" + hostname + ":" + port);
client.setSocketOption(client.DELAY, 0);
client.setSocketOption(client.KEEPALIVE, 0);
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OutputStream os = client.openOutputStream();
os.write("some string".getBytes());
int c = 0;
byte[] data = new byte[100];
is.read(data);
while((c = is.read()) != -1) {
System.out.print((char)c);
is.close();
os.close();
client.close();
}excellent thanks
for other users:
public byte[] getBytes() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
SocketConnection client = (SocketConnection) Connector.open("socket://" + hostname + ":" + port);
client.setSocketOption(client.DELAY, 0);
client.setSocketOption(client.KEEPALIVE, 0);
InputStream is = client.openInputStream();
OutputStream os = client.openOutputStream();
os.write("some string".getBytes());
int c = 0;
while((c = is.read()) != -1) {
baos.write(c);
is.close();
os.close();
client.close();
return baos.toByteArray();
} -
UnmarshalException for large byte array :: Weblogic 8.1 SP2
Hi,
1) We have a application running on Weblogic 8.1SP2.
2) Our scenario consist of Client code which reads a input file via Stream and converts it to a byte array before sending it to the Server.
When the server side code calls the Remote Bean (with byte array as an argument) it throws this exception :
"java.rmi.UnmarshalException: Software caused connection abort: socket write error"
Intermittently also got this error :: "weblogic.rjvm.PeerGoneException: ; nested exception is: java.io.EOFException"
3) This scenario works absolutely fine if the said Input File is of a smaller size.
4) I have also set the following params in config.xml <server .../> tag, but all in vain:
CompleteMessageTimeout="480" also tried with "0"
MaxMessageSize="2000000000"
NativeIOEnabled="true"
Also tried with :
MaxHTTPMessageSize="2000000000" & MaxT3MessageSize="2000000000"
Below is the exception trace:
java.rmi.UnmarshalException: Software caused connection abort: socket write error; nested exception is: java.net.SocketException: Software caused connection abort: socket write error
java.rmi.UnmarshalException: Software caused connection abort: socket write error; nested exception is: java.net.SocketException: Software caused connection abort: socket write error at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:297)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:244)
Caused by: java.net.SocketException: Software caused connection abort: socket write error
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:284)
... 6 more
Caused by: java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at weblogic.socket.SocketMuxer.write(SocketMuxer.java:721)
at weblogic.rjvm.t3.T3JVMConnection.sendMsg(T3JVMConnection.java:723)
at weblogic.rjvm.MsgAbbrevJVMConnection.sendOutMsg(MsgAbbrevJVMConnection.java:276)
at weblogic.rjvm.MsgAbbrevJVMConnection.sendMsg(MsgAbbrevJVMConnection.java:164)
at weblogic.rjvm.ConnectionManager.sendMsg(ConnectionManager.java:549)
at weblogic.rjvm.RJVMImpl.send(RJVMImpl.java:722)
at weblogic.rjvm.MsgAbbrevOutputStream.flushAndSendRaw(MsgAbbrevOutputStream.java:292)
at weblogic.rjvm.MsgAbbrevOutputStream.flushAndSend(MsgAbbrevOutputStream.java:300)
at weblogic.rjvm.MsgAbbrevOutputStream.sendRecv(MsgAbbrevOutputStream.java:322)
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:103)
... 7 more
Any thoughts would be helpful?
Thanks,
KhyatiHi,
1) We have a application running on Weblogic 8.1SP2.
2) Our scenario consist of Client code which reads a input file via Stream and converts it to a byte array before sending it to the Server.
When the server side code calls the Remote Bean (with byte array as an argument) it throws this exception :
"java.rmi.UnmarshalException: Software caused connection abort: socket write error"
Intermittently also got this error :: "weblogic.rjvm.PeerGoneException: ; nested exception is: java.io.EOFException"
3) This scenario works absolutely fine if the said Input File is of a smaller size.
4) I have also set the following params in config.xml <server .../> tag, but all in vain:
CompleteMessageTimeout="480" also tried with "0"
MaxMessageSize="2000000000"
NativeIOEnabled="true"
Also tried with :
MaxHTTPMessageSize="2000000000" & MaxT3MessageSize="2000000000"
Below is the exception trace:
java.rmi.UnmarshalException: Software caused connection abort: socket write error; nested exception is: java.net.SocketException: Software caused connection abort: socket write error
java.rmi.UnmarshalException: Software caused connection abort: socket write error; nested exception is: java.net.SocketException: Software caused connection abort: socket write error at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:297)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:244)
Caused by: java.net.SocketException: Software caused connection abort: socket write error
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:284)
... 6 more
Caused by: java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at weblogic.socket.SocketMuxer.write(SocketMuxer.java:721)
at weblogic.rjvm.t3.T3JVMConnection.sendMsg(T3JVMConnection.java:723)
at weblogic.rjvm.MsgAbbrevJVMConnection.sendOutMsg(MsgAbbrevJVMConnection.java:276)
at weblogic.rjvm.MsgAbbrevJVMConnection.sendMsg(MsgAbbrevJVMConnection.java:164)
at weblogic.rjvm.ConnectionManager.sendMsg(ConnectionManager.java:549)
at weblogic.rjvm.RJVMImpl.send(RJVMImpl.java:722)
at weblogic.rjvm.MsgAbbrevOutputStream.flushAndSendRaw(MsgAbbrevOutputStream.java:292)
at weblogic.rjvm.MsgAbbrevOutputStream.flushAndSend(MsgAbbrevOutputStream.java:300)
at weblogic.rjvm.MsgAbbrevOutputStream.sendRecv(MsgAbbrevOutputStream.java:322)
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:103)
... 7 more
Any thoughts would be helpful?
Thanks,
Khyati
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