VLSI Implementation of Barrel Distortion Correction in Endoscopic Images based on Least Squares Estimation

An efficient VLSI Implementation of Barrel Distor tion Correction (BDC) in Endoscopic Images based on Least Squares Estimation is presented in this paper. Computationa l complexity is reduced by employing Odd order poly n mial, as an approximation to Back-mapping expansion polynomial. This polynomial can be solved in monomial form, by Estrin's algorithm. In Estrin’s algorithm, a high order expression can be factorized in to sub-expression, which can be evalu ated in parallel. In our simulation, on comparison with some existing distor tion correction techniques, 75% of hardware cost an d 70% of memory requirement is reduced by using TSMC 0.18 μm technology.