Class HealPixImage

  • All Implemented Interfaces:
    java.io.Serializable, Component

    public class HealPixImage
    extends Image
    This class defines an image gotten by reading a HEALPix image where the pixels are in the nested pixel order. This assumes the FITS structures found in the WMAP data but could be adapted to other orders as needed. There are several HEALPix formats supported: A single HEALPix intensity array in the primary HDU HEALPix data in the first extension HDU as a binary table with each row in the table corresponding to a single pixel. This format can support multiple HEALPix Stokes parameter values per pixel, in particular I, Q and U and be read from the file and the derived quantities PI, PI/I, and PA can be returned if the I,Q,U are present. A single HEALPix intensity array stored in the first extension with R rows, where each row in the table has an array of N values representing RxN pixels. A HEALPix file which has been split into multiple tiles. These tiles will be read as needed.
    See Also:
    Serialized Form
    • Method Detail

      • getWidth

        public int getWidth()
        Get the width of the image in pixels
        Overrides:
        getWidth in class Image
      • getHeight

        public int getHeight()
        Get the height of the image in pixels
        Overrides:
        getHeight in class Image
      • getDepth

        public int getDepth()
        Only a scalar image. Note that if we are returning a PA image then this does not transform simply when we change coordinates. This is really a vector.
        Overrides:
        getDepth in class Image
      • getData

        public double getData​(long ipix)
        Get a single element of data
        Overrides:
        getData in class Image
      • getDataArray

        public double[] getDataArray()
        Probably should happen, but just in case we support the get array function.
        Overrides:
        getDataArray in class Image
      • setData

        public void setData​(long npix,
                            double val)
        Support changing the data! Probably won't use this...
        Overrides:
        setData in class Image