1. Electronic Videoendoscopy;Kato,1993
2. How reliable is determination of ulcer size by endoscopy;Sonnenberg;Br. Med. J.,1979
3. How accurate are endoscopic estimates of size;Margulies;Gastrointest. Endosc.,1994
4. Q. MaoLin, S. De Ma, Parametric and non-parametric approaches for camera calibration: analysis of imaging errors and their compensation, Proceedings of the Second Asian Conference on Computer Vision, Singapore, 1995, pp. II205–II209.
5. Some aspects of zoom lens camera calibration;Li;IEEE Trans. Pattern Anal. Mach. Intell.,1996