An efficient processor for joint barrel distortion correction and color demosaicking

This paper presents an efficient hardware architecture to perform the real-time correction of the barrel distortion in wide-angle cameras. Applied to the single-sensor cameras employing the Bayer pattern as the color filter array (CFA), the proposed architecture performs the backward mapping process once for each pixel location in the Bayer pattern and the sub-pixel image resampling process for each color channel considering the CFA. As a result, the proposed architecture performs the barrel distortion correction jointly with the color demosaicking effectively. A prototype of the BDC processor based on the proposed architecture is implemented with 53.3K logic gates in a 0.18μm CMOS technology and its correction speed is 311M pixels/s, which shows that the proposed architecture has low complexity even with such versatile functionality.