we introduce the concept of super-resolution spectroscopy based on sparse sampling in the frequency domain, and show that this can be naturally achieved using a random laser source. In its chaotic regime, the emission spectrum of a random laser features sharp spikes at uncorrelated frequencies that...
multi-scale feature fusionIn order to obtain super-resolution images with richer details and clearer textures, a method for image super-resolution ... J Shi,Y Xiu,G Tang - 《International Journal of Pattern Recognition & Artificial Intelligence》 被引量: 0发表: 2024年 Time-space-frequency featu...
Optical-domain spectral super-resolution via a quantum-memory-based time-frequency processorExisting super-resolution methods of optical imaging hold a solid place as an application in natural sciences, but many new developments allow for beating the diffraction limit in a more subtle way. One of ...
Suffering from smearing and leakage problems, conventional discrete Fourier transform (DFT) based methods cannot distinguish the heartbeat component from closely located respiration harmonics in frequency domain, especially in short-time processing. In this paper, the theory of sparse reconstruction is ...
The FT is based on the use of sinusoidal basis functions and has only frequency resolution and no time resolution. A remarkable aspect of the FT is the symmetry it displays between the time domain and the frequency domain. The FT allows us to study the global regularity of the signals but...
domain spectroscopy (THz-TDS). Firstly, the characteristic absorption spectrum of anthraquinone in the frequency range of 0.5～3.0 THz at room temperature was measured using the THz-TDS system. It was found that anthraquinone crystals have six distinct characteristic absorption peaks in this frequency...
Second, they have not fully leveraged the abundant spectral information in hyperspectral images. To address these challenges, we propose a novel hyperspectral super-resolution network named SNLSR, which transfers the super-resolution problem into the abundance domain. Our SNLSR leverages a spatial ...
frequency range of human hearing. They are linearly spaced overlapped triangular filters in the Mel-scale and logarithmically spaced at frequencies higher than 1 kHz in linear frequency scale[88,89]. The frequency axis is warped and evenly spaced with more weight (i.e., higher resolution) on ...
Resolution bias errors in spectral density, frequency response and coherence function measurements, II: Application to first-order systems (white noise excitation) Journal of Sound and Vibration (1985) J.S. Bendat et al. There are more references available in the full text version of this article...
Bands/Window Size: digital audio is transformed one small FFT block or 'window' at a time, each consisting of a number of samples, and the number of resulting frequency bands is always half this figure. A larger window size therefore increases the frequency resolution, since it results in mo...