Digital Holoscopy

Optimal non-uniform fast Fourier transform for high-speed swept source optical coherence tomography

“…Although the NDFT algorithm provides the most exact reconstruction result, the slow computation speed hinders its real-time application. Non-uniform FFT (NUFFT) is an approximation of the NDFT algorithm with much faster processing speed [11] , and has been recently implemented in FD-OCT. KaiserBessel (KB) kernel [12,13] and Gaussian kernel [14,15] have been independently used as the convolution kernel function for NUFFT. The selection of convolution kernel function is investigated by Chan et al, and the Gaussian kernel function is considered to be a better choice for on-thefly data processing [15] .…”