public function __construct() { parent::__construct(0.0, 1.0, 0.0, 1.0, -4.0, 1.0, 0.0, 1.0, 0.0); // findEdges }
public function __construct() { parent::__construct(1, 1, -1, 1, 1, -1, 1, -1, -1); }
public function __construct() { parent::__construct(-1, -1, -1, -1, 16, -1, -1, -1, -1); // sharpen }
public function __construct() { parent::__construct(0, 0, 1, 0, 0, 0, 1, 0, 0); // sharpen }