XPsf_Smooth help page


  GENERAL DESCRIPTION

  The XPsf_Smooth widget applies a variable box size median
  smoothing technique to the halo of a PSF image. The smoothing
  is performed only on the pixels lying outside a pre-fixed
  distance from the image maximum. The size of the smoothing
  box increases outwards as a power-law function of the radial
  distance from the center.
    
 
 
  PARAMETERS

  'Inner radius':
      Minimum distance from the PSF maximum for median smoothing.

  'Radial width of smoothing box':
      Radial width of smoothing box at a distance 2 * (Inner radius)
      from the center. Expressed in pixels.

  'Radial power':
      Exponent of power law expressing the radial width of the box
      as a function of the distance from the center.

  'Angular width of smoothing box':
      Radial width of smoothing box at a distance 2 * (Inner radius)
      from the center. Expressed in degrees.

  'Angular power':
      Exponent of power law expressing the angular width of the box
      as a function of the distance from the center.

  'Pad':
      Set 'yes' to pad the array with a frame of 0s before smoothing.
      It may be useful to prevent edge effects. Not always necessary.



  CONTROLS/BUTTONS

  'Processing...':
      Apply the currently defined options to the input image.
      Whenever the 'Processing...' button is pressed, the previous
      result is overwritten by the input image and the processing
      is performed with the current options. The result of the
      last processing is returned on output.

  'Display Options':
      Modify the display options of the displayed image.

  'Help':
      Display this help page.

  'Exit':
      Quit XPsf_Smooth.