/// <summary>
/// Asserts the results for the specified band.
/// </summary>
/// <param name="source">The source raster.</param>
/// <param name="sourceBandIndex">The band index of the source raster.</param>
/// <param name="result">The resulting raster.</param>
/// <param name="resultBandIndex">The band index of the resulting raster.</param>
/// <param name="filterRadius">The radius of the filter.</param>
private void AssertResultForBand(IRaster source, Int32 sourceBandIndex, IRaster result, Int32 resultBandIndex, Int32 filterRadius)
{
for (Int32 rowIndex = 0; rowIndex < result.NumberOfRows; rowIndex++)
{
for (Int32 columnIndex = 0; columnIndex < result.NumberOfColumns; columnIndex++)
{
Double filteredValue = 0;
switch (result.Format)
{
case RasterFormat.Integer:
for (Int32 filterRowIndex = -filterRadius; filterRowIndex <= filterRadius; filterRowIndex++)
{
for (Int32 filterColumnIndex = -filterRadius; filterColumnIndex <= filterRadius; filterColumnIndex++)
{
filteredValue += source.GetNearestValue(rowIndex + filterRowIndex, columnIndex + filterColumnIndex, sourceBandIndex);
}
}
filteredValue /= Calculator.Square(2 * filterRadius + 1);
Assert.AreEqual(Convert.ToUInt32(filteredValue), result.GetValue(rowIndex, columnIndex, resultBandIndex));
break;
case RasterFormat.Floating:
for (Int32 filterRowIndex = -filterRadius; filterRowIndex <= filterRadius; filterRowIndex++)
{
for (Int32 filterColumnIndex = -filterRadius; filterColumnIndex <= filterRadius; filterColumnIndex++)
{
filteredValue += source.GetNearestFloatValue(rowIndex + filterRowIndex, columnIndex + filterColumnIndex, sourceBandIndex);
}
}
filteredValue /= Calculator.Square(2 * filterRadius + 1);
Assert.AreEqual(filteredValue, result.GetFloatValue(rowIndex, columnIndex, resultBandIndex));
break;
}
}
}
}
/// <summary>
/// Gets the nearest spectral value to a specified row and column index.
/// </summary>
/// <param name="rowIndex">The zero-based column index of the value.</param>
/// <param name="columnIndex">The zero-based row index of the value.</param>
/// <returns>The spectral value located at the specified row and column index or in the nearest index if either the row or column indices are out of range.</returns>
/// <exception cref="System.NotSupportedException">The raster is not readable.</exception>
public UInt32 GetNearestValue(Int32 rowIndex, Int32 columnIndex)
{
return(_raster.GetNearestValue(rowIndex, columnIndex, _bandIndex));
}