scripts/builtin/img_mirror.dml

#-------------------------------------------------------------
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# to you under the Apache License, Version 2.0 (the
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#-------------------------------------------------------------

m_img_mirror = function(Matrix[Double] img_in, Boolean horizontal_axis) return (Matrix[Double] img_out) {
  # flip an image on the x (horizontal) or y (vertical) axis
  if( horizontal_axis)
    img_out = rev(img_in)
  else
    img_out = t(rev(t(img_in)))
}