A note on “On single-scanline camera calibration” [and reply]

In this correspondence, the single-scanline camera model proposed in the original paper (R. Horaud, R. Mohr and B. Lorecki, ibid., vol. 8, no. 1, p. 71-5, 1993) is modified to include a lens distortion coefficient. The authors say that, by this modification, the calibration approach presented will become more practical. The original authors accept that the improvement is sensible but say that the argument is not rigorous and suggest better approaches to some aspects