Package org.esa.snap.core.dataop.resamp

Interface Resampling

All Known Implementing Classes:
BilinearInterpolationResampling
public interface Resampling
An interface used to implement different resampling strategies.

  • Field Details

    • NEAREST_NEIGHBOUR

      static final Resampling NEAREST_NEIGHBOUR
      The nearest neighbour resampling method.

    • BILINEAR_INTERPOLATION

      static final Resampling BILINEAR_INTERPOLATION
      The bilinear interpolation resampling method.

    • CUBIC_CONVOLUTION

      static final Resampling CUBIC_CONVOLUTION
      The cubic convolution resampling method.

    • BISINC_5_POINT_INTERPOLATION

      static final Resampling BISINC_5_POINT_INTERPOLATION
      The bisinc interpolation resampling method.

    • BISINC_11_POINT_INTERPOLATION

      static final Resampling BISINC_11_POINT_INTERPOLATION

    • BISINC_21_POINT_INTERPOLATION

      static final Resampling BISINC_21_POINT_INTERPOLATION

    • BICUBIC_INTERPOLATION

      static final Resampling BICUBIC_INTERPOLATION
      The bicubic spline interpolation resampling method.

  • Method Details

    • getName

      String getName()
      Gets a unique identifier for this resampling method, e.g. "BILINEAR_INTERPOLATION".
      Returns:
      a unique name

    • createIndex

      Resampling.Index createIndex()
      Factory method which creates an appropriate index for raster access.
      Returns:
      an appropriate index, never null

    • computeIndex

      void computeIndex(double x, double y, int width, int height, Resampling.Index index)
      Computes the index's properties for the given pixel coordinate.
      Parameters:
      x - the raster's x coordinate
      y - the raster's y coordinate
      width - the raster's width
      height - the raster's height
      index - the index object to which the results are to be assigned

    • computeCornerBasedIndex

      default void computeCornerBasedIndex(double x, double y, int width, int height, Resampling.Index index)
      Computes the index's properties for the given non-pixel coordinate without pixel center intensity assumption.

      The default implementation computes the resampling index for given coordinate without pixel center intensity assumption. It adds 0.5 to coordinates to counter the consideration of pixel center in base function.

      Parameters:
      x - the raster's x coordinate
      y - the raster's y coordinate
      width - the raster's width
      height - the raster's height
      index - the index object to which the results are to be assigned

    • resample

      double resample(Resampling.Raster raster, Resampling.Index index) throws Exception
      Performs the actual resampling operation. If a sample value could not be computed at the given index, e.g. in case of missing data, the method returns the special value Float.NaN.
      Parameters:
      raster - the raster
      index - the index, must be computed using the computeIndex(double, double, int, int, org.esa.snap.core.dataop.resamp.Resampling.Index) method
      Returns:
      either the re-sampled sample value or Float.NaN.
      Throws:
      Exception - if a non-runtime error occurs, e.g I/O error

    • getKernelSize

      default int getKernelSize()