[vtkusers] How to read and display a JPEG image

[Elvis Dowson]

Sorry,
              I made it work using vtkImageActor but it doesn't work  
with vtkActor2D.

Here is the code that works using vtkImageActor (This displays the  
image in 3D, but I want to use vtkActor2D but that doesnt seem to work)

Working code

	// Declare object instance variables
	vtkJPEGReader* imageReader;
	vtkImageMapper* imageMapper;	
	vtkImageActor* mapActor;
	
	// Initialize objects
	imageReader = NULL;
	imageMapper = NULL;
	mapActor = NULL;
		
	// Read 2D image file
	imageReader = vtkJPEGReader::New();
		imageReader->SetFileName("/Users/elvis/Image/sample.jpg");
		imageReader->Update();
	
	// Map 2D image file
	imageMapper = vtkImageMapper::New();
		imageMapper->SetInput(imageReader->GetOutput());
		
	// Actor in scene
	mapActor = vtkImageActor::New();
		mapActor->SetInput(imageMapper->GetInput());	
		
	// Add Actor to renderer
	ren->AddActor(mapActor);

Code that doesn't display the image

Here is the attempt at using vtkActor2D but it doesnt work. Could some  
one please tell me how I can get this to work?


	// Declare object instance variables
	vtkJPEGReader* imageReader;
	vtkImageMapper* imageMapper;
	vtkActor2D* mapActor;		

	
	// Initialize objects
	imageReader = NULL;
	imageMapper = NULL;
	mapActor = NULL;
		
	// Read 2D image file
	imageReader = vtkJPEGReader::New();
		imageReader->SetFileName("/Users/elvis/Image/sample.jpg");
		imageReader->Update();
	
	// Map 2D image file
	imageMapper = vtkImageMapper::New();
		imageMapper->SetInput(imageReader->GetOutput());
		
	// Actor in scene
	mapActor = vtkActor2D::New();
		mapActor->SetMapper(imageMapper);		
		
	// Add Actor to renderer
	ren->AddActor(mapActor);


Best regards,

Elvis Dowson

On Oct 3, 2008, at 1:43 PM, Elvis Dowson wrote:

> Hi,
>        I found out the reason why, I had to explicitly specify the  
> full path to the image file name and it worked.
>
> imageReader->SetFileName("/Users/elvis/Image/sample.jpg");
> imageReader->Update();
>
> Best regards,
>
> Elvis Dowson
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20081003/01067013/attachment.htm>