REGISTER_FILTER(PIXDESCTEST, pixdesctest, vf);
REGISTER_FILTER(PP, pp, vf);
REGISTER_FILTER(PP7, pp7, vf);
+ REGISTER_FILTER(PREMULTIPLY, premultiply, vf);
REGISTER_FILTER(PREWITT, prewitt, vf);
REGISTER_FILTER(PSNR, psnr, vf);
REGISTER_FILTER(PULLUP, pullup, vf);