/// <summary> Splits the current subband in its four subbands. It changes the status
/// of this element (from a leaf to a node, and sets the filters), creates
/// the childs and initializes them. An IllegalArgumentException is thrown
/// if this subband is not a leaf.
///
/// <p>It uses the initChilds() method to initialize the childs.</p>
///
/// </summary>
/// <param name="hfilter">The horizontal wavelet filter used to decompose this
/// subband. It has to be a AnWTFilter object.
///
/// </param>
/// <param name="vfilter">The vertical wavelet filter used to decompose this
/// subband. It has to be a AnWTFilter object.
///
/// </param>
/// <returns> A reference to the LL leaf (subb_LL).
///
/// </returns>
/// <seealso cref="Subband.initChilds">
///
/// </seealso>
protected internal override Subband split(WaveletFilter hfilter, WaveletFilter vfilter)
{
// Test that this is a node
if (isNode)
{
throw new System.ArgumentException();
}
// Modify this element into a node and set the filters
isNode = true;
this.hFilter = (AnWTFilter)hfilter;
this.vFilter = (AnWTFilter)vfilter;
// Create childs
subb_LL = new SubbandAn();
subb_LH = new SubbandAn();
subb_HL = new SubbandAn();
subb_HH = new SubbandAn();
// Assign parent
subb_LL.parentband = this;
subb_HL.parentband = this;
subb_LH.parentband = this;
subb_HH.parentband = this;
// Initialize childs
initChilds();
// Return reference to LL subband
return(subb_LL);
}
/// <summary> Parse filters from the given word
///
/// </summary>
/// <param name="word">String to parse
///
/// </param>
/// <returns> Analysis wavelet filter (first dimension: by direction,
/// second dimension: by decomposition levels)
/// </returns>
private AnWTFilter[][] parseFilters(System.String word)
{
AnWTFilter[][] filt = new AnWTFilter[2][];
for (int i = 0; i < 2; i++)
{
filt[i] = new AnWTFilter[1];
}
if (word.ToUpper().Equals("w5x3".ToUpper()))
{
filt[0][0] = new AnWTFilterIntLift5x3();
filt[1][0] = new AnWTFilterIntLift5x3();
return(filt);
}
else if (word.ToUpper().Equals("w9x7".ToUpper()))
{
filt[0][0] = new AnWTFilterFloatLift9x7();
filt[1][0] = new AnWTFilterFloatLift9x7();
return(filt);
}
else
{
throw new System.ArgumentException("Non JPEG 2000 part I filter: " + word);
}
}
/// <summary> Splits the current subband in its four subbands. It changes the status
/// of this element (from a leaf to a node, and sets the filters), creates
/// the childs and initializes them. An IllegalArgumentException is thrown
/// if this subband is not a leaf.
///
/// <p>It uses the initChilds() method to initialize the childs.</p>
///
/// </summary>
/// <param name="hfilter">The horizontal wavelet filter used to decompose this
/// subband. It has to be a AnWTFilter object.
///
/// </param>
/// <param name="vfilter">The vertical wavelet filter used to decompose this
/// subband. It has to be a AnWTFilter object.
///
/// </param>
/// <returns> A reference to the LL leaf (subb_LL).
///
/// </returns>
/// <seealso cref="Subband.initChilds">
///
/// </seealso>
protected internal override Subband split(WaveletFilter hfilter, WaveletFilter vfilter)
{
// Test that this is a node
if (isNode)
{
throw new System.ArgumentException();
}
// Modify this element into a node and set the filters
isNode = true;
this.hFilter = (AnWTFilter) hfilter;
this.vFilter = (AnWTFilter) vfilter;
// Create childs
subb_LL = new SubbandAn();
subb_LH = new SubbandAn();
subb_HL = new SubbandAn();
subb_HH = new SubbandAn();
// Assign parent
subb_LL.parentband = this;
subb_HL.parentband = this;
subb_LH.parentband = this;
subb_HH.parentband = this;
// Initialize childs
initChilds();
// Return reference to LL subband
return subb_LL;
}
/// <summary> Parse filters from the given word
///
/// </summary>
/// <param name="word">String to parse
///
/// </param>
/// <returns> Analysis wavelet filter (first dimension: by direction,
/// second dimension: by decomposition levels)
/// </returns>
private AnWTFilter[][] parseFilters(System.String word)
{
AnWTFilter[][] filt = new AnWTFilter[2][];
for (int i = 0; i < 2; i++)
{
filt[i] = new AnWTFilter[1];
}
if (word.ToUpper().Equals("w5x3".ToUpper()))
{
filt[0][0] = new AnWTFilterIntLift5x3();
filt[1][0] = new AnWTFilterIntLift5x3();
return filt;
}
else if (word.ToUpper().Equals("w9x7".ToUpper()))
{
filt[0][0] = new AnWTFilterFloatLift9x7();
filt[1][0] = new AnWTFilterFloatLift9x7();
return filt;
}
else
{
throw new System.ArgumentException("Non JPEG 2000 part I filter: " + word);
}
}
