CORRECTION OF DISTORTION IN ENDOSCOPE IMAGES

被引:87
作者
SMITH, WE [1 ]
VAKIL, N [1 ]
MAISLIN, SA [1 ]
机构
[1] UNIV ROCHESTER,DEPT MED,DIV GASTROENTEROL,ROCHESTER,NY 14642
关键词
D O I
10.1109/42.126918
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Images formed with endoscopes suffer from a spatial distortion due to the wide-angle nature of the endoscope's objective lens. The distortion causes areas in the image farther from the center of the field to appear significantly smaller than they really are. This change in the size of objects with position precludes quantitative measurement of the area of the objects. Quantitative area determinations are important in endoscopy for accurately measuring ulcer and lesion sizes over time, so that a need exists for correcting the distortion of the image. We present our method for correcting the distortion characteristic of endoscope images. A polynomial correction formula was developed for the endoscope lens and validated by comparing quantitative test areas before and after the distortion correction. The distortion correction has been incorporated into a computer program that could readily be applied to electronic images obtained at endoscopy using a desk-top computer. The research presented here is a key step towards the quantitative determination of the area of regions of interest in endoscopy.
引用
收藏
页码:117 / 122
页数:6
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