Section: Visualization Toolkit IO Classes
The minimal structure of the MetaImage header is the following:
NDims = 3 DimSize = 181 217 181 ElementType = MET_UCHAR ElementSpacing = 1.0 1.0 1.0 ElementByteOrderMSB = False ElementDataFile = brainweb1.raw
* NDims indicate that this is a 3D image. ITK can handle images of arbitrary dimension. * DimSize indicates the size of the volume in pixels along each direction. * ElementType indicate the primitive type used for pixels. In this case is "unsigned char", implying that the data is digitized in 8 bits / pixel. * ElementSpacing indicates the physical separation between the center of one pixel and the center of the next pixel along each direction in space. The units used are millimeters. * ElementByteOrderMSB indicates is the data is encoded in little or big endian order. You might want to play with this value when moving data between different computer platforms. * ElementDataFile is the name of the file containing the raw binary data of the image. This file must be in the same directory as the header.
MetaImage headers are expected to have extension: ".mha" or ".mhd"
Once you write this header text file, it should be possible to read the image into your ITK based application using the itk::FileIOToImageFilter class.
To create an instance of class vtkMetaImageWriter, simply invoke its constructor as follows
obj = vtkMetaImageWriter
obj
is an instance of the vtkMetaImageWriter class.
string = obj.GetClassName ()
int = obj.IsA (string name)
vtkMetaImageWriter = obj.NewInstance ()
vtkMetaImageWriter = obj.SafeDownCast (vtkObject o)
obj.SetFileName (string fname)
- Specify file name of meta file
string = obj.GetFileName ()
- Specify the file name of the raw image data.
obj.SetRAWFileName (string fname)
- Specify the file name of the raw image data.
string = obj.GetRAWFileName ()
- Specify the file name of the raw image data.
obj.SetCompression (bool compress)
bool = obj.GetCompression (void )
obj.Write ()