[Tutor] From byte[] to Image

[Ziad Rahhal]

Hi Alan,

The Library I am using is the PIL. And I read the Docs, they say the
following about "frombuffer" operation:
(Note that this function decodes pixel data only, not entire images. If you
have an entire image file in a string, wrap it in a *StringIO* object, and
use *open*<file:///home/rahhal/Imaging-1.1.5/Docs/pythondoc-PIL.Image.html#PIL.Image.open-function>to
load it.)

So I guess "frombuffer" must not be used in my case.

The java method is working correctly but I am not able to form the picture
in the right way at the client side using the PIL library.

I am receiving an array of byte from "public byte[] getFile(String path)",
but how to form the Image at the client side?

By the way that is how I am sending the Image as byte array to the python
client:

public byte[] getFile(String fileName){

                try{
                        File imgFile = new File(fileName);
                        BufferedImage img = ImageIO.read(imgFile);
                        ByteArrayOutputStream bas = newByteArrayOutputStream();
                        ImageIO.write(img, "jpg", bas);
                        data = bas.toByteArray();
                } catch (Exception e){
                        e.printStackTrace();
                }
                System.out.println(data[2]);
                return data;
        } // end getFile

I receive it at the client side in python:
buffer = service.getFile(fileName)

How to form the Image from here? It is a jpg Image constructed originally
from vtk using Mesa library for off-screen rendering.

Thank you again,

Ziad





On 9/16/06, Alan Gauld <alan.gauld at freenet.co.uk> wrote:
>
> Hi Ziad,
>
> Can you give us a bit mor4e detail.
>
> > #**************************************************************
> > # fileName is the path of the file
> > stream = service.getFile(fileName)
> >
> > file = open("pic.jpeg", 'w')
> >
> > img = Image.frombuffer("1", (128, 128), stream)
> > img.save(file)
>
> Which library are you using here? Is it the PIL?
>
> > The Java method is: "public byte[] getFile(String path)"
> >
> > This is not working. I am not able to get all the data of the image
> > and for sure not able to form the complete image.
>
> Are you saying the Java code is not working?
> Or that the value you get back from the web service is not
> what you expected? Or that the resultant byte array is what
> you expected but it is not being transformed to an image correctly?
>
> I'm not 100% sure what the problem is here.
>
> Alan G.
>
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