Camera Processing With Chromatic Aberration

Abstract—Since the refractive index of materials commonly used for lens depends on the wavelengths of light, practical camera optics fail to converge light to a single point on an image plane. Known as chromatic aberration, this phenomenon distorts image details by introducing magnification error, defocus blur, and color fringes. Though achromatic and apochromatic lens de-signs reduce chromatic aberration to a degree, they are complex and expensive and they do not offer a perfect correction. In this work, we propose a new post-capture processing scheme designed to overcome these problems computationally. Specifically, the pro-posed solution is comprised of “chromatic aberration-tolerant” demosaicking algorithm and post-demosaicking chromatic aber-ration correction. Experiments with simulated and real sensor data verify that the chromatic aberration is effectively corrected. Index Terms—Chromatic aberration, demosaicking, sensors. I