![Figure 2 from Asymmetric optical image encryption using random Hilbert mask based on fast walsh hadamard transform | Semantic Scholar Figure 2 from Asymmetric optical image encryption using random Hilbert mask based on fast walsh hadamard transform | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/c8520771ea5f6cce79f2ddc62a64b45b4103d347/3-Figure2-1.png)
Figure 2 from Asymmetric optical image encryption using random Hilbert mask based on fast walsh hadamard transform | Semantic Scholar
![Gabriel Peyré on Twitter: "Hadamard–Rademacher–Walsh transform is the Fourier transform on the group (Z/2Z)^n, and enjoys a N*log(N) fast transform. It is used among other thing in error correcting codes. https://t.co/ipXOKRorZ3 https://t.co/GuN2YMsGu9 Gabriel Peyré on Twitter: "Hadamard–Rademacher–Walsh transform is the Fourier transform on the group (Z/2Z)^n, and enjoys a N*log(N) fast transform. It is used among other thing in error correcting codes. https://t.co/ipXOKRorZ3 https://t.co/GuN2YMsGu9](https://pbs.twimg.com/media/DqQG_miWkAEqt4B.jpg)
Gabriel Peyré on Twitter: "Hadamard–Rademacher–Walsh transform is the Fourier transform on the group (Z/2Z)^n, and enjoys a N*log(N) fast transform. It is used among other thing in error correcting codes. https://t.co/ipXOKRorZ3 https://t.co/GuN2YMsGu9
![The projection vectors of the Walsh-Hadamard transform of order n 1⁄4 8... | Download Scientific Diagram The projection vectors of the Walsh-Hadamard transform of order n 1⁄4 8... | Download Scientific Diagram](https://www.researchgate.net/publication/7591015/figure/fig3/AS:281115760840708@1444034628406/The-projection-vectors-of-the-Walsh-Hadamard-transform-of-order-n-14-8-ordered-with.png)
The projection vectors of the Walsh-Hadamard transform of order n 1⁄4 8... | Download Scientific Diagram
![Symmetry | Free Full-Text | Hierarchical Cubical Tensor Decomposition through Low Complexity Orthogonal Transforms Symmetry | Free Full-Text | Hierarchical Cubical Tensor Decomposition through Low Complexity Orthogonal Transforms](https://pub.mdpi-res.com/symmetry/symmetry-12-00864/article_deploy/html/images/symmetry-12-00864-ag.png?1590639798)