public static void foo(void) 
{ 
	//initialiase a connection to an OMERO server.
        Login login = new Login(username, password);
        Server server = new Server(servername, 1099);
        ServiceFactory sf = new ServiceFactory(server, login);
        uid = sf.getAdminService().getEventContext().getCurrentUserId();
        IQuery query = sf.getQueryService();
        IUpdate up = sf.getUpdateService();
        RawPixelsStore rawpix = sf.createRawPixelsStore();
       
	//Now grab a specific (unique_id) Image and it's Pixels off the server.
	long unique_id = 140350;         
	Filter filter = new Filter().owner(uid);
        Parameters params = new Parameters(filter); 
        params.addId(unique_id);  
        List<Image> imgs = query.findAllByQuery("select i from Image i" +
                                 " left outer join fetch i.pixels pix"+
                                 " where i.id = :id",params);
	Image img = imgs.get(0);    

	//Grab a Pixels object from the Image 
	//we assume that the original image 
	//pixels are the first entry  
        Pixels origpixs = null;
        if(img.sizeOfPixels()!=0)
        {
           origpixs = img.getPixels(0);
        }
        
	//Now if we have the original Pixels
        if(origpixs!=null)
        {
		//Create a new Pixels object
		//with the exact same dimensions, order, type etc...
		Pixels pixs = new Pixels();
		pixs.setPixelsDimensions(origpixs.getPixelsDimensions());
		pixs.setDimensionOrder(origpixs.getDimensionOrder());
		pixs.setPixelsType(origpixs.getPixelsType());           
		pixs.setSizeX(origpixs.getSizeX());
		pixs.setSizeY(origpixs.getSizeY());
		pixs.setSizeZ(origpixs.getSizeZ());
		pixs.setSizeC(origpixs.getSizeC());
		pixs.setSizeT(origpixs.getSizeT());
		pixs.setSha1(origpixs.getSha1());  
		
		//Add this Pixels object to the image.        
		img.addPixels(pixs);

		//Update it to the database
		img = (Image) up.saveAndReturnObject(img);

		//Now lets actually write some data in our new Pixels
		pixs = img.getPixels(img.sizeOfPixels()-1);                   
		rawpix.setPixelsId(pixs.getId());                        
		for(int z=0; z<pixs.getSizeZ(); z++)
		for(int t=0; t<pixs.getSizeT(); t++)
		for(int c=0; c<pixs.getSizeC(); c++)
		{
			byte[] array = rawpix.getPlane(z,c,t);

			for(int j=0; j<array.length; j++)
			{
				array[j] = (byte)255;
			}

			rawpix.setPlane(array, z,c,t);
		}

		up.saveObject(img);		
        }
}