ITK/Examples/Images/ConvertPixelBuffer: Difference between revisions
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==ConvertPixelBuffer.cxx== | ==ConvertPixelBuffer.cxx== | ||
<source lang="cpp"> | <source lang="cpp"> | ||
#include "itkRGBPixel.h" | |||
#include "itkRGBAPixel.h" | |||
#include "itkImage.h" | #include "itkImage.h" | ||
#include " | #include "itkDefaultConvertPixelTraits.h" | ||
#include "itkConvertPixelBuffer.h" | #include "itkConvertPixelBuffer.h" | ||
#include " | #include "itkImageRandomConstIteratorWithIndex.h" | ||
int main(int argc, char* argv[]) | |||
int main(int, char *[]) | |||
{ | { | ||
const int xDimension = 200; | |||
const int yDimension = 100; | |||
typedef itk:: | typedef unsigned char ComponentType; | ||
typedef itk::RGBPixel<ComponentType> RGBPixelType; | |||
typedef itk::RGBAPixel<ComponentType> RGBAPixelType; | |||
typedef itk::Image< RGBPixelType, 2 > RGBImageType; | |||
typedef itk::Image< RGBAPixelType, 2 > RGBAImageType; | |||
typedef itk::DefaultConvertPixelTraits< RGBPixelType > | |||
TraitsType; | |||
typedef itk::ConvertPixelBuffer< ComponentType, RGBPixelType, TraitsType > | |||
RGBAConverterType; | |||
RGBImageType::Pointer rgbImg = RGBImageType::New(); | |||
RGBAImageType::Pointer rgbaImg = RGBAImageType::New(); | |||
// | // Create the two images | ||
// RGBAImage | |||
RGBAImageType::IndexType rgbaStart; | |||
rgbaStart[0] = 0; | |||
rgbaStart[1] = 0; | |||
RGBAImageType::SizeType rgbaSize; | |||
rgbaSize[0] = xDimension; | |||
rgbaSize[1] = yDimension; | |||
itk::ImageRegion<2> rgbaRegion(rgbaStart,rgbaSize); | |||
rgbaImg->SetRegions(rgbaRegion); | |||
rgbaImg->Allocate(); | |||
RGBAPixelType rgbaDefault; | |||
rgbaDefault[0] = 127; | |||
rgbaDefault[1] = 100; | |||
rgbaDefault[2] = 230; | |||
rgbaDefault[3] = 255; | |||
rgbaImg->FillBuffer(rgbaDefault); | |||
// | // RGBImage | ||
RGBImageType::IndexType rgbStart = rgbaStart; | |||
RGBImageType::SizeType rgbSize = rgbaSize; | |||
itk::ImageRegion<2> rgbRegion = rgbaRegion; | |||
rgbImg->SetRegions(rgbRegion); | |||
rgbImg->Allocate(); | |||
size_t numberOfPixels = | |||
rgbImg->GetLargestPossibleRegion().GetNumberOfPixels(); | |||
// | // Convert a raw buffer to a buffer of pixel types | ||
RGBAConverterType::Convert( | |||
static_cast<ComponentType *>(rgbaImg->GetPixelContainer()->GetBufferPointer()->GetDataPointer()), | |||
rgbaImg->GetNumberOfComponentsPerPixel(), | |||
(rgbImg->GetPixelContainer()->GetBufferPointer()), | |||
numberOfPixels); | |||
// | // Check a few random values | ||
itk::ImageRandomConstIteratorWithIndex<RGBImageType> | |||
rgbIterator(rgbImg, rgbImg->GetLargestPossibleRegion()); | |||
rgbIterator.SetNumberOfSamples(numberOfPixels / 10); | |||
rgbIterator.GoToBegin(); | |||
while(!rgbIterator.IsAtEnd()) | |||
{ | |||
if (rgbImg->GetPixel(rgbIterator.GetIndex())[0] != | |||
rgbaImg->GetPixel(rgbIterator.GetIndex())[0] || | |||
rgbImg->GetPixel(rgbIterator.GetIndex())[1] != | |||
rgbaImg->GetPixel(rgbIterator.GetIndex())[1] || | |||
rgbImg->GetPixel(rgbIterator.GetIndex())[2] != | |||
rgbaImg->GetPixel(rgbIterator.GetIndex())[2]) | |||
{ | { | ||
std::cout << "Copy failed for index " << rgbIterator.GetIndex() | |||
<< " got " << rgbImg->GetPixel(rgbIterator.GetIndex()) | |||
<< " but expected " << rgbaImg->GetPixel(rgbIterator.GetIndex()) | |||
<< std::endl; | |||
} | } | ||
++rgbIterator; | |||
} | |||
return EXIT_SUCCESS; | |||
} | } | ||
</source> | </source> | ||
{{ | {{ITKCMakeLists|{{SUBPAGENAME}}}} |
Revision as of 21:36, 7 November 2013
ConvertPixelBuffer.cxx
<source lang="cpp">
- include "itkRGBPixel.h"
- include "itkRGBAPixel.h"
- include "itkImage.h"
- include "itkDefaultConvertPixelTraits.h"
- include "itkConvertPixelBuffer.h"
- include "itkImageRandomConstIteratorWithIndex.h"
int main(int argc, char* argv[]) {
const int xDimension = 200; const int yDimension = 100;
typedef unsigned char ComponentType; typedef itk::RGBPixel<ComponentType> RGBPixelType; typedef itk::RGBAPixel<ComponentType> RGBAPixelType; typedef itk::Image< RGBPixelType, 2 > RGBImageType; typedef itk::Image< RGBAPixelType, 2 > RGBAImageType; typedef itk::DefaultConvertPixelTraits< RGBPixelType > TraitsType; typedef itk::ConvertPixelBuffer< ComponentType, RGBPixelType, TraitsType > RGBAConverterType;
RGBImageType::Pointer rgbImg = RGBImageType::New(); RGBAImageType::Pointer rgbaImg = RGBAImageType::New();
// Create the two images // RGBAImage RGBAImageType::IndexType rgbaStart; rgbaStart[0] = 0; rgbaStart[1] = 0;
RGBAImageType::SizeType rgbaSize; rgbaSize[0] = xDimension; rgbaSize[1] = yDimension;
itk::ImageRegion<2> rgbaRegion(rgbaStart,rgbaSize); rgbaImg->SetRegions(rgbaRegion); rgbaImg->Allocate();
RGBAPixelType rgbaDefault; rgbaDefault[0] = 127; rgbaDefault[1] = 100; rgbaDefault[2] = 230; rgbaDefault[3] = 255; rgbaImg->FillBuffer(rgbaDefault);
// RGBImage RGBImageType::IndexType rgbStart = rgbaStart; RGBImageType::SizeType rgbSize = rgbaSize; itk::ImageRegion<2> rgbRegion = rgbaRegion; rgbImg->SetRegions(rgbRegion); rgbImg->Allocate();
size_t numberOfPixels = rgbImg->GetLargestPossibleRegion().GetNumberOfPixels();
// Convert a raw buffer to a buffer of pixel types RGBAConverterType::Convert( static_cast<ComponentType *>(rgbaImg->GetPixelContainer()->GetBufferPointer()->GetDataPointer()), rgbaImg->GetNumberOfComponentsPerPixel(), (rgbImg->GetPixelContainer()->GetBufferPointer()), numberOfPixels);
// Check a few random values itk::ImageRandomConstIteratorWithIndex<RGBImageType> rgbIterator(rgbImg, rgbImg->GetLargestPossibleRegion()); rgbIterator.SetNumberOfSamples(numberOfPixels / 10); rgbIterator.GoToBegin(); while(!rgbIterator.IsAtEnd()) { if (rgbImg->GetPixel(rgbIterator.GetIndex())[0] != rgbaImg->GetPixel(rgbIterator.GetIndex())[0] ||
rgbImg->GetPixel(rgbIterator.GetIndex())[1] != rgbaImg->GetPixel(rgbIterator.GetIndex())[1] ||
rgbImg->GetPixel(rgbIterator.GetIndex())[2] != rgbaImg->GetPixel(rgbIterator.GetIndex())[2]) { std::cout << "Copy failed for index " << rgbIterator.GetIndex() << " got " << rgbImg->GetPixel(rgbIterator.GetIndex()) << " but expected " << rgbaImg->GetPixel(rgbIterator.GetIndex()) << std::endl; } ++rgbIterator; } return EXIT_SUCCESS;
} </source>
CMakeLists.txt
<syntaxhighlight lang="cmake"> cmake_minimum_required(VERSION 3.9.5)
project(ConvertPixelBuffer)
find_package(ITK REQUIRED) include(${ITK_USE_FILE}) if (ITKVtkGlue_LOADED)
find_package(VTK REQUIRED) include(${VTK_USE_FILE})
endif()
add_executable(ConvertPixelBuffer MACOSX_BUNDLE ConvertPixelBuffer.cxx)
if( "${ITK_VERSION_MAJOR}" LESS 4 )
target_link_libraries(ConvertPixelBuffer ITKReview ${ITK_LIBRARIES})
else( "${ITK_VERSION_MAJOR}" LESS 4 )
target_link_libraries(ConvertPixelBuffer ${ITK_LIBRARIES})
endif( "${ITK_VERSION_MAJOR}" LESS 4 )
</syntaxhighlight>
Download and Build ConvertPixelBuffer
Click here to download ConvertPixelBuffer and its CMakeLists.txt file. Once the tarball ConvertPixelBuffer.tar has been downloaded and extracted,
cd ConvertPixelBuffer/build
- If ITK is installed:
cmake ..
- If ITK is not installed but compiled on your system, you will need to specify the path to your ITK build:
cmake -DITK_DIR:PATH=/home/me/itk_build ..
Build the project:
make
and run it:
./ConvertPixelBuffer
WINDOWS USERS PLEASE NOTE: Be sure to add the ITK bin directory to your path. This will resolve the ITK dll's at run time.
Building All of the Examples
Many of the examples in the ITK Wiki Examples Collection require VTK. You can build all of the the examples by following these instructions. If you are a new VTK user, you may want to try the Superbuild which will build a proper ITK and VTK.
ItkVtkGlue
ITK >= 4
For examples that use QuickView (which depends on VTK), you must have built ITK with Module_ITKVtkGlue=ON.
ITK < 4
Some of the ITK Examples require VTK to display the images. If you download the entire ITK Wiki Examples Collection, the ItkVtkGlue directory will be included and configured. If you wish to just build a few examples, then you will need to download ItkVtkGlue and build it. When you run cmake it will ask you to specify the location of the ItkVtkGlue binary directory.