Evaluation of Correction Methods of Chromatic Aberration in Digital Camera Images

Abstract

This paper reports an experiment conducted to evaluate correction methods of chromatic aberrations in images acquired by a nonmetric digital camera. The chromatic aberration correction methods evaluated in the experiment are classified into two kinds. One is the method to correct image coordinates by using camera calibration results of color-separated images. The other is the method based on the assumption that the magnitude of chromatic aberrations can be expressed by a function of a radial distance from the center of an image frame. The former is classified further into five types according to the difference of orientation parameters common to all colors. The latter is classified further into three types according to the order of the correction function. We adopt a linear function, a quadratic function and a cubic function of the radial distance as a correction function. We utilize a set of 16 convergent images shooting a white sheet with 10 by 10 black filled circles to carry out camera calibration and estimate unknown coefficients in the correction function by means of least squares adjustment. We evaluate the chromatic aberration correction methods by using a normal image shooting a white sheet with 14 by 10 black filled circles. From the experiment results, we conclude that the method based on the assumption that the magnitude of chromatic aberrations can be expressed by a cubic function of the radial distance is the best method of the evaluated methods, and would be able to correct chromatic aberrations satisfactorily enough in many cases.

Investigation Into the Behaviour and Modelling of Chromatic Aberrations in Non-Metric Digital Cameras

“…Whereas Case 3 is akin to the approach of Luhmann et al (2006), the other three represent relaxed versions. It should be noted that the modelling approaches listed above are similar to those reported by Matsuoka et al (2012). However, their paper focuses more on other image-space transformation methods for correcting chromatic aberration.…”

Precise Correction of Lateral Chromatic Aberration in Images

“…However, Bould and Wolberg [5] do not use any aberration model, interpolating the correction of control points, whereas all other warping methods assume radial nature of the distortion. Matsuoka et al [6] provide an evaluation of the state of art correction methods, all of which use different ways to model the radial distortion [7,8,9]. However, it is important to note that not all cameras can be satisfactorily corrected by the same radial model.…”

Flat Versus Hemispherical Dome Ports in Underwater Photogrammetry

“…The effect of chromatic aberrations in close range photogrammetry has been investigated mainly for high precision photogrammetric applications where the effect of separate image measurements for each colour channel can lead to a significant accuracy enhancement of a factor about 1.3 (Luhmann et al, 2006). Other rigorous methods that consider a colour or multi spectral dependent calibration and processing are discussed in (Reznicek et al 2016;Robson et al, 2014;Matsuoka et al, 2012). Optical aberrations in underwater photography are much more severe and difficult to correct with respect to those generally seen for regular cameras above the water.…”