A pipelined architecture for real-time correction of barrel distortion in wide-angle camera images

Abstract

An efficient pipelined architecture for the real-time correction of barrel distortion in wide-angle camera images is presented in this paper. The distortion correction model is based on least-squares estimation to correct the nonlinear distortion in images. The model parameters include the expanded/corrected image size, the back-mapping coefficients, distortion center, and corrected center. The coordinate rotation digital computer (CORDIC) based hardware design is suitable for an input image size of 1028/spl times/1028 pixels and is pipelined to operate at a clock frequency of 40 MHz. The VLSI system will facilitate the use of a dedicated hardware that could be mounted along with the camera unit.

Keywords

This publication has 13 references indexed in Scilit:

Non-linear spatial warping of endoscopic images: an architectural perspective for real time applications
Microprocessors and Microsystems, 2002
Videoendoscopic distortion correction and its application to virtual guidance of endoscopy
IEEE Transactions on Medical Imaging, 2001
Video image processing with the Sonic architecture
Computer, 2000
A new method for distortion correction of electronic endoscope images
IEEE Transactions on Medical Imaging, 1995
How accurate are endoscopic estimates of size?
Gastrointestinal Endoscopy, 1994
Camera calibration with distortion models and accuracy evaluation
Published by Institute of Electrical and Electronics Engineers (IEEE) ,1992
Correction of distortion in endoscope images
IEEE Transactions on Medical Imaging, 1992
Simple calibration algorithm for high-distortion lens camera
Published by Institute of Electrical and Electronics Engineers (IEEE) ,1992
A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses
IEEE Journal on Robotics and Automation, 1987
How reliable is determination of ulcer size by endoscopy?
BMJ, 1979