REGISTER_FILTER(MERGEPLANES, mergeplanes, vf);
REGISTER_FILTER(MPDECIMATE, mpdecimate, vf);
REGISTER_FILTER(NEGATE, negate, vf);
REGISTER_FILTER(MERGEPLANES, mergeplanes, vf);
REGISTER_FILTER(MPDECIMATE, mpdecimate, vf);
REGISTER_FILTER(NEGATE, negate, vf);