Tiled-Block Image Reconstruction by Wavelet- Based, Parallel-Filtered Back-Projection

Jorge Guevara Escobedo, Krikor B. Ozanyan
2016 IEEE Sensors Journal  
We demonstrate an algorithm, relevant to tomography sensor systems, to obtain images from the parallel reconstruction of essentially localized elements at different scales. This is achieved by combining methodology to reconstruct images from limited and/or truncated data, with the time-frequency capabilities of the Wavelet Transform. Multi-scale, as well as time-frequency, localization properties of the separable twodimensional wavelet transform are exploited as an approach for faster
more » ... tion. The speed up is realized not only by reducing the computation load on a single processor, but also by achieving the parallel reconstruction of several tiled blocks. With tiled-block image reconstruction by wavelet-based, parallel filtered back-projection we measure more than 36 times gain in speed, compared to standard filtered back-projection. are with the School of Electrical and Electronic Engineering, The University of Manchester, M13 9PL, Manchester, UK. JGE wishes to acknowledge the financial support of Consejo Nacional de Ciencia y Tecnología (CONACyT), Mexico, for a doctoral studentship. A 1530-437X (c) Krikor B. Ozanyan (M'95, SM'03) received his MSc degree in engineering physics (semiconductors) and PhD degree in solid-state physics, in 1980 and 1989 respectively. He has held previous academic and research posts in the University of Sofia, The Norwegian Institute of Technology (Trondheim, Norway), the University of Hull (UK), and the University of Sheffield (UK), working on projects ranging from Brewster-angle mid-IR spectroscopic ellipsometry and electron confinement in quantum wells and barriers, to the demonstration of the lasing at 333nm from strained MQW ZnCdS/ZnS structures and in-situ real-time optical monitoring of growth of III-V semiconductors in MBE and MOCVD reactors. His current interests are in the area of photonic sensors and indirect imaging (tomography) by optical modalities, signal processing for optical experiments, and spectroscopy with ultrafast laser sources. He is currently Head of Sensors, Imaging and Signal Processing at the University of Manchester and
doi:10.1109/jsen.2016.2546182 fatcat:xhr6xh6mpffrhabhbjtmmvor5e