ISSN:
1349-9432
Keywords:
stereo CCD endoscope
;
topographic measurement
;
image sequency
;
stereo matching
;
disparity
;
inclined view
;
gastrointestinal surface
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In endoscopic diagnosis, there has been a strong requirement to measure the internal surface topography of the rectum or esophagus. Accurate measurement, however, is very difficult, because the object is usually observed from an inclined view. In this paper, we propose a method to overcome this difficulty utilizing sequential stereo-pair images; the relative shape is roughly measured from sequential images taken by one of the change coupled device (CCD) cameras, and the size is determined by stereo-pair matching using the measured shape. A coarse-to-fine approach is also used to improve the resolution of topographic measurement. Through a basic experiment using a monocular CCD endoscope and a polyp phantom, the proposed method is confirmed to improve measurement accuracy in comparison with conventional methods.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10043-998-0352-x
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