[vtkusers] How to read and display a JPEG image

[Miguel Angel Rodriguez Florido]

	Please, look at:

http://www.vtk.org/doc/nightly/html/classvtkActor2D.html

Elvis Dowson wrote:
> 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
>>
>>
> 



-- 
Miguel Angel Rodríguez Florido
Departamento de Ingeniería del Software
División de Investigación y Desarrollo Tecnológico
INSTITUTO TECNOLOGICO DE CANARIAS, S.A. - GOBIERNO DE CANARIAS
URL: www.itccanarias.org Tlfno: +34 928 727548, Fax: +34 928 727517

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