FreeMat: vtkImageReader

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vtkImageReader

Section: Visualization Toolkit IO Classes

# Usage

vtkImageReader provides methods needed to read a region from a file. It supports both transforms and masks on the input data, but as a result is more complicated and slower than its parent class vtkImageReader2.

To create an instance of class vtkImageReader, simply invoke its constructor as follows

      obj = vtkImageReader

# Methods

The class vtkImageReader has several methods that can be used. They are listed below. Note that the documentation is translated automatically from the VTK sources, and may not be completely intelligible. When in doubt, consult the VTK website. In the methods listed below, `obj` is an instance of the vtkImageReader class.

- `string = obj.GetClassName ()`
- `int = obj.IsA (string name)`
- `vtkImageReader = obj.NewInstance ()`
- `vtkImageReader = obj.SafeDownCast (vtkObject o)`
- `obj.SetDataVOI (int , int , int , int , int , int )` - Set/get the data VOI. You can limit the reader to only read a subset of the data.
- `obj.SetDataVOI (int a[6])` - Set/get the data VOI. You can limit the reader to only read a subset of the data.
- `int = obj. GetDataVOI ()` - Set/get the data VOI. You can limit the reader to only read a subset of the data.
- `vtkTypeUInt64 = obj.GetDataMask ()` - Set/Get the Data mask. The data mask is a simply integer whose bits are treated as a mask to the bits read from disk. That is, the data mask is bitwise-and'ed to the numbers read from disk. This ivar is stored as 64 bits, the largest mask you will need. The mask will be truncated to the data size required to be read (using the least significant bits).
- `obj.SetDataMask (vtkTypeUInt64 )` - Set/Get the Data mask. The data mask is a simply integer whose bits are treated as a mask to the bits read from disk. That is, the data mask is bitwise-and'ed to the numbers read from disk. This ivar is stored as 64 bits, the largest mask you will need. The mask will be truncated to the data size required to be read (using the least significant bits).
- `obj.SetTransform (vtkTransform )` - Set/Get transformation matrix to transform the data from slice space into world space. This matrix must be a permutation matrix. To qualify, the sums of the rows must be + or - 1.
- `vtkTransform = obj.GetTransform ()` - Set/Get transformation matrix to transform the data from slice space into world space. This matrix must be a permutation matrix. To qualify, the sums of the rows must be + or - 1.
- `obj.ComputeInverseTransformedExtent (int inExtent[6], int outExtent[6])`
- `int = obj.OpenAndSeekFile (int extent[6], int slice)`
- `obj.SetScalarArrayName (string )` - Set/get the scalar array name for this data set.
- `string = obj.GetScalarArrayName ()` - Set/get the scalar array name for this data set.