A new paper on MTF Mapper's deferred slanted edge analysis algorithm has been published in the Optical Society of America's JOSA A journal. The paper describes one of the methods that MTF Mapper can use to compensate for radial lens distortion. The paper also covers the technique that MTF Mapper uses to process Bayer CFA subsets, e.g., when processing just the green Bayer channel of a raw mosaiced image.
The full reference:
F. van den Bergh, Deferred slanted-edge analysis: a unified approach to spatial frequency response measurement on distorted images and color filter array subsets, Journal of the Optical Society of America A, Vol. 35, Issue 3, pp. 442-451 (2018).
You can see the on-line abstract here. The full article is paywalled, but if you contact me by email I can send you an alternative document that covers the same topic. I will probably post some articles on this topic here on the blog sometime too.