[Insight-users] Pixel Exteaction

[RAGHU PRASAD]

Respected Sir,


I want to extract(access pixel data)  froam a gray scale image,but my
program crashes with the followinf error message

First-chance exception at 0x7c81eb33 in Image.exe: Microsoft C++ exception:
itk::ImageFileReaderException at memory location 0x0131fb54..

Unhandled exception at 0x7c81eb33 in Image.exe: Microsoft C++ exception:
itk::ImageFileReaderException at memory location 0x0131fb54..

Iam posting the code.Please rectify the error.



#if defined(_MSC_VER)

#pragma warning ( disable : 4786 )

#endif

#include "itkImage.h"

#include "itkImageFileReader.h"

int main( int , char * argv[])

{

typedef unsigned char PixelType;

const unsigned int Dimension = 2;



ImageType::Pointer image = ImageType::New();

typedef itk::Image< PixelType, Dimension > ImageType;



typedef itk::ImageFileReader< ImageType > ReaderType;

ReaderType::Pointer reader = ReaderType::New();

const char * filename = argv[1];

reader->SetFileName( filename );

reader->Update();

ImageType::Pointer image = reader->GetOutput();

ImageType::IndexType start;

ImageType::SizeType size;

size[0] = 200; // size along X

size[1] = 200; // size along Y

size[2] = 200; // size along Z

start[0] = 0; // first index on X

start[1] = 0; // first index on Y

start[2] = 0; // first index on Z

ImageType::RegionType region;

region.SetSize( size );

region.SetIndex( start );

image->SetRegions( region );

image->Allocate();

ImageType::PixelType initialValue = 0;

image->FillBuffer( initialValue );

ImageType::IndexType pixelIndex;

pixelIndex[0] = 27;

pixelIndex[1] = 29;

pixelIndex[2] = 37;

ImageType::PixelType pixelValue = image->GetPixel( pixelIndex );

image->SetPixel( pixelIndex, pixelValue+1 );

 return 0;

}





-- 
Warm Regards

Raghu Prasad
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