Insight into the Fourier Transform Band Pass Filtering Technique

Implementation of Band Pass Filter for Homomorphic Filtering Technique

In order to improve the performance of homomorphic filtering technique for face images, band pass filter is selected to replace the conventional high pass filter in homomorphic filtering technique. Apart from the noise reduction capability, the band pass filter is specifically designed for face images as it is based on the locations of illumination component in Fourier spectrum. The qualitative...

Spin filtering with EuO: Insight from the complex band structure

Pavel V. Lukashev,1 Aleksander L. Wysocki,1,2 Julian P. Velev,3 Mark van Schilfgaarde,4 Sitaram S. Jaswal,1 Kirill D. Belashchenko,1 and Evgeny Y. Tsymbal1,* 1Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA 2School of Applied Engineering Physics, Cornell University, Ithaca, New York 14853, USA 3Department ...

Radar Matched Filtering using the Fractional Fourier Transform

A matched filter is the optimal linear filter for maximizing the signal to noise ratio (SNR) in the presence of additive noise. Matched filters are commonly used in radar systems where the transmitted signal is known and may be used as a replica to be correlated with the received signal which can be carried out by multiplication in the frequency domain by applying Fourier Transform (FT). Fracti...

Mitophagy: New Insight into the Cardiovascular Aging  

Hyperspectral imaging using the single-pixel Fourier transform technique

Hyperspectral imaging technology is playing an increasingly important role in the fields of food analysis, medicine and biotechnology. To improve the speed of operation and increase the light throughput in a compact equipment structure, a Fourier transform hyperspectral imaging system based on a single-pixel technique is proposed in this study. Compared with current imaging spectrometry approac...