(PECL imagick 2.0.0)
ImagickPixelIterator::getPreviousIteratorRow — Returns the previous row
This function is currently not documented; only its argument list is available.
Returns the previous row as an array of pixel wands from the pixel iterator.
Returns the previous row as an array of ImagickPixelWand objects from the ImagickPixelIterator, throwing ImagickPixelIteratorException on error.