6 citations · 21 across the 19 of their papers we have counts for
4 papers · 1 filter
Enhanced Digital Halftoning via Weighted Sigma-Delta Modulation
Felix Krahmer, Anna Veselovska
In this paper, we study error diffusion techniques for digital halftoning from the perspective of 1-bit Sigma-Delta quantization. We introduce a method to generate Sigma-Delta sche…
A sample efficient sparse FFT for arbitrary frequency candidate sets in high dimensions
Lutz Kämmerer, Felix Krahmer, Toni Volkmer
In this paper a sublinear time algorithm is presented for the reconstruction of functions that can be represented by just few out of a potentially large candidate set of Fourier ba…
Well conditioned ptychograpic imaging via lost subspace completion
Anton Forstner, Felix Krahmer, Oleh Melnyk +1
Ptychography, a special case of the phase retrieval problem, is a popular method in modern imaging. Its measurements are based on the shifts of a locally supported window function.…
Sparse Harmonic Transforms: A New Class of Sublinear-time Algorithms for Learning Functions of Many Variables
Bosu Choi, Mark Iwen, Felix Krahmer
We develop fast and memory efficient numerical methods for learning functions of many variables that admit sparse representations in terms of general bounded orthonormal tensor pro…