Title :
Auto-adapted Iterative Deflective Tomography approaching high frequency field accurately
Author_Institution :
Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing
Abstract :
A new deflective tomography system was put forward and named auto-adapted iterative deflective tomography (AIDT). It was tested to approach the accurate values with sufficient projections. A high frequency field was designed. It was simulated to project in all directions. Two cross projections was selected to reconstruct the field by AIDT. Then, projections were increased step by step. The reconstructed results were studied. As a result, high frequency sections are distorted a lot. With a few projections, the reconstructed result loses the basic characteristics of the model. With projections increasing, the distortion gets lighter and lighter. Near the critical projections, the reconstructed field becomes similar to the model except some high frequency sections. When eighty-four projections are employed, the reconstructed result is in accord with the model. In this case, the mean square error (MSE) is 0.00000999, and the peak error (PE) is 0.013142%. As we know, this is most accurate reconstruction to now. AIDT can accurately reconstruct the high frequency field.
Keywords :
computerised tomography; image reconstruction; mean square error methods; optical distortion; optical tomography; auto-adapted iterative deflective tomography; high frequency field; image distortion; image reconstruction; mean square error; two cross projections; Educational institutions; Frequency; Iterative methods; Numerical simulation; Optical computing; Poles and towers; System testing; Temperature sensors; Tomography; Visualization; Numerical simulation; high frequency field; projection; reconstruction; tomography;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697735