3 ms·
IIRC, Hamming's book "Digital Filters" (1989) has a section on FFTs with only the sign of the coefficient being used. It performed surprisingly well.
by mjcohen 3y ago
IIRC, Hamming's book "Digital Filters" (1989) has a section on FFTs with only the sign of the coefficient being used. It performed surprisingly well.
- thomasahle 3y agoYou mean Fast Hadamard Transform?
- mitthrowaway2 3y agoWhat is the sign of a complex number? Do you mean the phase?
- nine_k 3y agoAFAICT, both the real and imaginary components are from (-1, 0, +1) only. No single sign, but only 8 directions and the center.
- deleted 3y ago[deleted]