static function filter( $width, $height )
    {
        return array(
            new ezcImageFilter( 
                'scale',
                array( 
                    'width'     => intval( $width ),
                    'height'    => intval( $height ),
                    'direction' => ezcImageGeometryFilters::SCALE_BOTH 
                )
            )
        );
    }