InteractWithImage
VTKExamples/Cxx/Images/InteractWithImage
Description
This example shows how to display an image and zoom/pan/adjust brightness interactively. A picture of the bunny is provided for the demo.
Code
InteractWithImage.cxx
#include <vtkJPEGReader.h>
#include <vtkImageMapper3D.h>
#include <vtkImageActor.h> // Note: this is a 3D actor (c.f. vtkImageMapper which is 2D)
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkSmartPointer.h>
int main(int argc, char* argv[])
{
// Parse input arguments
if ( argc != 2 )
{
std::cout << "Required parameters: Filename" << std::endl;
return EXIT_FAILURE;
}
std::string inputFilename = argv[1];
// Read the image
vtkSmartPointer<vtkJPEGReader> reader =
vtkSmartPointer<vtkJPEGReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->Update();
// Create an actor
vtkSmartPointer<vtkImageActor> actor =
vtkSmartPointer<vtkImageActor>::New();
actor->GetMapper()->SetInputConnection(reader->GetOutputPort());
// Setup renderer
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
renderer->ResetCamera();
// Setup render window
vtkSmartPointer<vtkRenderWindow> window =
vtkSmartPointer<vtkRenderWindow>::New();
window->AddRenderer(renderer);
// Setup render window interactor
vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow(window);
// Setup interactor style (this is what implements the zooming, panning and brightness adjustment functionality)
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
interactor->SetInteractorStyle(style);
// Render and start interaction
interactor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(InteractWithImage)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(InteractWithImage MACOSX_BUNDLE InteractWithImage.cxx)
target_link_libraries(InteractWithImage ${VTK_LIBRARIES})
Download and Build InteractWithImage
Click here to download InteractWithImage and its CMakeLists.txt file. Once the tarball InteractWithImage.tar has been downloaded and extracted,
cd InteractWithImage/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./InteractWithImage
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.