Digital imaging colposcopy: corrected area measurements using shape-from-shading.
Digital imaging colposcopy: corrected area measurements using shape-from-shading.
复制标题
数字成像阴道镜：使用阴影形状校正面积测量。
DOI：
10.1109/42.746633
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Ji,Q
中科院分区：
文献类型：
--
作者：
Craine,BL;Craine,ER;O'Toole,CJ;Ji,Q
The quantitative measurement of areas on the cervix is of interest to researchers studying the natural history of human papilloma viral lesions. Measurement of areas from images obtained through a colposcope are, however, inherently in error due to the image being a two-dimensional projection of a three-dimensional object. The ability to correct for these errors through use of digital imaging colposcopy and a practical application of a shape from shading algorithm was developed in this study. The shape from shading technique requires empirical measurement of the relationship between observed light intensity and the viewing angle (referred to as a reflection map). It was found that a population mean reflection map provided a correction that was about as accurate as using an individual's own reflection map (making it unnecessary to measure a map for each exam). Digital red filtering of the images increased accuracy and precision of measurement.
