Function Index
	DiscreteHadamardTransform DiscreteHadamardTransform[img] returns the discrete Hadamard transform (DHT) of img. DiscreteHadamardTransform[img, {n1,n2,...}] returns the DHT of a zero-padded img with dimensions n1×n2×.... The 1D DHT of a sequence x[n] is defined as for k = 0,1,...,N-1, with N=2m where m is an integer. The 2D DHT of a sequence x[n1,n2] is defined as for k1= 0, 1, ... , N1-1 and k2 = 0, 1,..., N2-1, where N1 = 2m1, N2=2m2, m1, and m2 are integers, and bi(z) is the i-th bit in the binary representation of z. The addition of the bits bi in the exponent of -1 is in modulo-2 arithmetic. Note that the forward and inverse Hadamard transforms are identical. The option SequencyOrdered→True returns the ordered form of the Hadamard transform. The default value is SequencyOrdered→False. The argument img may be a vector, matrix, or ImageData expression. See also User's Guide 8.5. Example This loads the package. In[1]:= This computes and displays the DHT of a 2D sequence that depicts a white rectangle on a black background. In[2]:= Here we show the result of computing an ordered Hadamard transform of the sequence. In[3]:=