[Insight-users] using reader as global variable
john smith
mkitkinsightuser at gmail.com
Mon May 30 10:19:19 EDT 2011
Well, I have fixed that but when I am running my program, I do not get any
errors. But when I start debug then an exception of Qt is caught. I can
really understand why? I give you my code.The strange think is that when I
declare my directory without using push_button_File() function, but inside
the z_slice_extract(), I take my results correctly. Couls somebody help me?
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "canvas.h"
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkExtractImageFilter.h"
#include <itkSize.h>
QString fileName;
unsigned long size_x;
unsigned long size_y;
unsigned long size_z;
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->graphicsView_inputImage->setScene(scene=new Canvas());
connect(scene,SIGNAL(mousejustpressed(int,int)),this,SLOT(mousejustpressed(int,int)));
QObject::connect(ui->pushButton_openFile, SIGNAL(clicked()), this,
SLOT(push_button_File()));
QObject::connect(ui->pushButton_slice_z, SIGNAL(clicked()), this,
SLOT(z_slice_extract()));
}
void MainWindow::push_button_File()
{
QString fileName = QFileDialog::getOpenFileName(this,
tr("Open File"), QDir::currentPath());
}
void MainWindow::z_slice_extract()
{
///unsigned char to display in .png format
typedef unsigned char InputPixelType;
typedef unsigned char OutputPixelType;
typedef itk::Image< InputPixelType, 3 > InputImageType;
typedef itk::Image< OutputPixelType, 2 > OutputImageType;
typedef itk::ImageFileReader< InputImageType > ReaderType;
typedef itk::ImageFileWriter< OutputImageType > WriterType;
ReaderType::Pointer reader = ReaderType::New();
WriterType::Pointer writer = WriterType::New();
reader->SetFileName( fileName.toStdString() );
writer->SetFileName( "2D.png" );
typedef itk::ExtractImageFilter< InputImageType, OutputImageType >
FilterType;
FilterType::Pointer filter = FilterType::New();
reader->Update();
InputImageType::RegionType inputRegion =
reader->GetOutput()->GetLargestPossibleRegion();
InputImageType::SizeType size = inputRegion.GetSize();
// get the size of the hole 3D image
unsigned long size_x = size[0];
unsigned long size_y = size[1];
unsigned long size_z = size[2];
// get slices of z coordiante
size[2] = 0;
InputImageType::IndexType start = inputRegion.GetIndex();
// const unsigned int sliceNumber = 90;
ui->verticalScrollBar_z->setRange(1,size_z);
unsigned int sliceNumber = ui->verticalScrollBar_z->value();
start[2] = sliceNumber;
// ui->verticalScrollBar_z->setValue(sliceNumber);
InputImageType::RegionType desiredRegion;
desiredRegion.SetSize( size );
desiredRegion.SetIndex( start );
filter->SetExtractionRegion( desiredRegion );
filter->SetInput( reader->GetOutput() );
writer->SetInput( filter->GetOutput() );
try
{
writer->Update();
}
catch( itk::ExceptionObject & err )
{
std::cerr << "ExceptionObject caught !" << std::endl;
std::cerr << err << std::endl;
}
scene->addPixmap(QPixmap("2D.png"));
ui->graphicsView_resultImage->setScene(scene);
// ui->graphicsView_resultImage->set;
/** static QGraphicsPixmapItem* pixmapItem;
if (!pixmapItem) {
// pixmapItem = scene->addPixmap(QPixmap("2D.png"));
QPixmap tmpmap (QPixmap("2D.png"));
pixmapItem = scene->addPixmap ( tmpmap.scaled (214,256) );
ui->graphicsView_inputImage->setScene(scene);
} else {
QPixmap tmpmap (QPixmap("2D.png"));
pixmapItem->setPixmap(tmpmap.scaled ( 214,256));
}
*/
// taking the size of the loaded image
ui->label_4->setText(QString("size x:%1").arg(size_x));
ui->label_5->setText(QString("size y:%1").arg(size_y));
ui->label_6->setText(QString("size z:%1").arg(size_z));
return;
}
void MainWindow::mousejustpressed(int x,int y)
{
int k1=256-y;
unsigned char value;
QImage image(scene->sceneRect().size().toSize(),
QImage::Format_RGB32);
QPainter painter(&image);
scene->render(&painter);
value=image.pixel(x,k1);
/**QImage buffer = QImage(1,1, QImage::Format_RGB32);
QPainter painter(&buffer);
scene->render(&painter, QRectF(0.0, 0.0, 1.0, 1.0), QRectF(x, y, 1.0,
1.0));
int value = qGray(buffer.pixel(0,0));
*/
ui->label->setText(QString("x:%1").arg(x));
ui->label_2->setText(QString("y:%1").arg(k1));
ui->label_3->setText(QString("pixel value:%1").arg(value));
}
MainWindow::~MainWindow()
{
delete ui;
}
2011/5/30 David Doria <daviddoria at gmail.com>
> On Mon, May 30, 2011 at 5:25 AM, john smith <mkitkinsightuser at gmail.com>wrote:
>
>> I am using Qt add in for visual studio 2010 and I have typed this. But
>> still gettting these errors:
>> *1>e:\qt
>> applications\mainwindow_globalreader\mainwindow\mainwindow\mainwindow.h(49):
>> error C2065: 'ImageType' : undeclared identifier
>> 1>e:\qt
>> applications\mainwindow_globalreader\mainwindow\mainwindow\mainwindow.h(50):
>> error C2955: 'itk::ImageFileReader' : use of class template requires
>> template argument list
>> 1> c:\itk\source\code\io\itkImageFileReader.h(93) : see
>> declaration of 'itk::ImageFileReader'
>> 1>e:\qt
>> applications\mainwindow_globalreader\mainwindow\mainwindow\mainwindow.h(50):
>> fatal error C1903: unable to recover from previous error(s); stopping
>> compilation
>> 1> mainwindow.cpp*
>>
>> I have include the header fules "itkImage.h" ,"itkImageFileReader.h".Could
>> somebody help me?
>>
>> class MainWindow : public QMainWindow
>> {
>> ..............
>>
>>
>> private:
>> typedef itk::ImageFileReader< ImageType > ReaderType;
>> ReaderType::Pointer reader;
>>
>> };
>>
>>
>> MainWindow::MainWindow(QWidget *parent) :
>> QMainWindow(parent),
>> ui(new Ui::MainWindow)
>> {
>> ............
>> ...........
>> typedef unsigned char InputPixelType;
>> typedef itk::Image< InputPixelType, 3 > InputImageType;
>> typedef itk::ImageFileReader< InputImageType > ReaderType;
>>
>> ReaderType::Pointer reader = ReaderType::New();
>>
>> }
>>
>
>
> As the error says, you have not defined ImageType. You need something like
>
> typedef itk::Image<unsigned char, 2> ImageType;
>
> David
>
>
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