[Vxl-users] get RAW-Data from Image and display as Bitmap

[Jochen F. <Fra...@gm...>]

Hi there again,

so, almost a new topic. I try to read an Image, and store the image-data in an array.
Then I want to display it on Screen, I use the "CreateBitmap" function.
Ok, enough theory, here is the code:

//******************************************************************************
	vil_image_view<vxl_byte> img2 = vil_load("minivan.tif");

	vxl_byte* pixel =  new vxl_byte[img2.ni()*img2.nj()*4];


	unsigned int nplanes=img2.nplanes();
	unsigned int ii=0;
	
//	for(int p=0; p<nplanes; p+=1)
	{
		for (unsigned int nj=0; nj<img2.nj(); nj+=1)
		{
			for(unsigned int ni=0; ni<img2.ni(); ni+=1)
			{
				vxl_byte val;
				val = img2(ni,nj,0);
				pixel[ii] = val;
				ii++;
				val = img2(ni,nj,1);
				pixel[ii] = val;
				ii++;
				val = img2(ni,nj,2);
				pixel[ii] = val;
				ii++;
			}
		}
	}

	
	int ni = img2.ni();
	int nj = img2.nj();

	CBitmap bmp;

	bmp.CreateCompatibleBitmap(pDC,ni,nj);
	bmp.SetBitmapBits(ni*nj*4,pixel);


	CDC dcMemory;
	dcMemory.CreateCompatibleDC(pDC);
	dcMemory.SelectObject(&bmp);
	pDC->BitBlt(0, 0, ni, nj, &dcMemory, 0, 0, SRCCOPY);

	delete [] pixel;
//******************************************************************************
(This code runs under MFC)

I know it looks a not very fine, cause its the test! 
The result is not that what I want do have. 
When I read only Plane <1> and <2> the Bitmap looks a bit nicer, but it's not original, and the new Image has the size of the (1/4) of Original.

What's my mistake? How are the RAW-data stored in the "vil_image_view"?

Tanks, Ciao Jochen


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