• Thumbnail for Hadamard transform
    The Hadamard transform (also known as the Walsh–Hadamard transform, Hadamard–Rademacher–Walsh transform, Walsh transform, or Walsh–Fourier transform) is...
    32 KB (4,739 words) - 00:09, 16 May 2025
  • Thumbnail for Fast Walsh–Hadamard transform
    mathematics, the Hadamard ordered fast Walsh–Hadamard transform (FWHTh) is an efficient algorithm to compute the Walsh–Hadamard transform (WHT). A naive...
    3 KB (387 words) - 17:18, 8 December 2024
  • Thumbnail for Quantum logic gate
    See measurement for details. H 2 {\displaystyle H_{2}} performs the Hadamard transform on two qubits. Similarly the gate H ⊗ H ⊗ ⋯ ⊗ H ⏟ n  times = ⨂ i =...
    76 KB (10,347 words) - 10:02, 8 May 2025
  • The pseudo-Hadamard transform is a reversible transformation of a bit string that provides cryptographic diffusion. See Hadamard transform. The bit string...
    2 KB (399 words) - 10:15, 4 January 2025
  • Thumbnail for Controlled NOT gate
    with respect to a Hadamard transformed basis { | + ⟩ , | − ⟩ } {\displaystyle \{|+\rangle ,|-\rangle \}} . The Hadamard transformed basis of a one-qubit...
    19 KB (2,523 words) - 16:29, 5 January 2025
  • Thumbnail for Time-of-flight mass spectrometry
    mass spectrometers and in ion mobility spectrometers, as well as Hadamard transform TOF mass spectrometers. The Bradbury–Nielsen shutter is ideal for...
    30 KB (3,944 words) - 07:40, 3 April 2025
  • )^{n}} , and in this case the Fourier transform is the Hadamard transform. This is achieved by applying a Hadamard gate to each of the n qubits in parallel...
    20 KB (3,302 words) - 15:43, 25 February 2025
  • Thumbnail for Hadamard matrix
    In mathematics, an Hadamard matrix, named after the French mathematician Jacques Hadamard, is a square matrix whose entries are either +1 or −1 and whose...
    26 KB (3,716 words) - 20:33, 18 May 2025
  • beyond 3 dB. Cohn and Lempel showed the relationship of the MLS to the Hadamard transform. This relationship allows the correlation of an MLS to be computed...
    12 KB (1,638 words) - 00:29, 20 September 2024
  • Discrete sine transform Discrete wavelet transform Hadamard transform (or, Walsh–Hadamard transform) Fast wavelet transform Hankel transform, the determinant...
    3 KB (264 words) - 23:15, 12 March 2025
  • algorithm uses both the Hadamard transform (by applying a Hadamard gate to every qubit) as well as the quantum Fourier transform. The former considers the...
    13 KB (2,052 words) - 00:36, 8 May 2025
  • for video compression. It works by taking a frequency transform, usually a Hadamard transform, of the differences between the pixels in the original...
    2 KB (264 words) - 19:07, 17 January 2024
  • Thumbnail for Hadamard product (matrices)
    In mathematics, the Hadamard product (also known as the element-wise product, entrywise product: ch. 5  or Schur product) is a binary operation that takes...
    21 KB (2,733 words) - 23:12, 23 March 2025
  • Hadamard transform (Walsh function). Fourier transform on finite groups. Discrete Fourier transform (general). The use of all of these transforms is...
    7 KB (1,001 words) - 21:41, 28 February 2025
  • H(q); // Hadamard Transform Not(q); // Invert q CPhase(pi, q); // Rotate if q=1111.. !Not(q); // undo inversion !H(q); // undo Hadamard Transform } defines...
    4 KB (567 words) - 12:19, 2 December 2024
  • Thumbnail for Normal distribution
    investigation into the connection between the fast Hadamard transform and the normal distribution, since the transform employs just addition and subtraction and...
    148 KB (22,607 words) - 17:11, 14 May 2025
  • 1950. Transform coding dates back to the late 1960s, with the introduction of fast Fourier transform (FFT) coding in 1968 and the Hadamard transform in 1969...
    68 KB (7,556 words) - 01:03, 15 May 2025
  • Thumbnail for Fast Fourier transform
    interaction algorithm, which provided efficient computation of Hadamard and Walsh transforms. Yates' algorithm is still used in the field of statistical...
    67 KB (7,814 words) - 18:05, 2 May 2025
  • functions, the Walsh system, the Walsh series, and the fast Walsh–Hadamard transform are all named after the American mathematician Joseph L. Walsh. They...
    15 KB (2,367 words) - 03:17, 3 April 2025
  • across branches and the Hadamard transform can even provide evidence that the data do not fit a tree. The Hadamard transform can also be combined with...
    36 KB (6,331 words) - 11:14, 30 December 2024
  • of convex functions. Hadamard transform, an example of a generalized class of Fourier transforms Fast Walsh–Hadamard transform, an efficient algorithm...
    2 KB (298 words) - 11:54, 27 September 2023
  • Thumbnail for Image compression
    1952. Transform coding dates back to the late 1960s, with the introduction of fast Fourier transform (FFT) coding in 1968 and the Hadamard transform in 1969...
    19 KB (2,109 words) - 13:55, 5 May 2025
  • algorithm. The quantum subroutine of the algorithm makes use of the Hadamard transform H ⊗ n | k ⟩ = 1 2 n ∑ j = 0 2 n − 1 ( − 1 ) k ⋅ j | j ⟩ {\displaystyle...
    17 KB (3,247 words) - 22:43, 20 February 2025
  • Thumbnail for Bernstein–Vazirani algorithm
    using quantum computing. The quantum algorithm is as follows: Apply a Hadamard transform to the n {\displaystyle n} qubit state | 0 ⟩ ⊗ n {\displaystyle |0\rangle...
    7 KB (1,225 words) - 19:26, 20 February 2025
  • Thumbnail for Walsh matrix
    computing the Walsh transform and have applications in the efficient implementation of certain signal processing operations. The Hadamard matrices of dimension...
    6 KB (1,119 words) - 21:09, 14 April 2025
  • efficient basis function representation. Using linear Hadamard spectral tests (see Hadamard transform), the first of these sequences will be found to be...
    9 KB (1,112 words) - 18:41, 18 March 2024
  • basis | 0 ⟩ , | 1 ⟩ {\displaystyle |0\rangle ,|1\rangle } and the Hadamard-transformed basis | + ⟩ = | 0 ⟩ + | 1 ⟩ 2 {\displaystyle |+\rangle ={\frac {|0\rangle...
    30 KB (2,748 words) - 15:23, 17 May 2025
  • Thumbnail for Twofish
    borrows some elements from other designs; for example, the pseudo-Hadamard transform (PHT) from the SAFER family of ciphers. Twofish has a Feistel structure...
    9 KB (827 words) - 14:21, 3 April 2025
  • Thumbnail for Hadamard code
    The Hadamard code is an error-correcting code named after the French mathematician Jacques Hadamard that is used for error detection and correction when...
    23 KB (3,844 words) - 18:53, 17 May 2025
  • in a 4×4 pixel sub-block with a discrete cosine transform or a Walsh–Hadamard transform. Both transforms are done with fixed-point arithmetic to avoid rounding...
    49 KB (4,386 words) - 17:10, 18 May 2025