CAJ | 학술논문

目的：??通过对头部模型面部的测量分析，来研究iWitness摄影测量系统在颌面部应用的精确性与准确性。方法??利用iWitness摄影测量系统重复获取头部模型标志点的三维坐标值，来评估在不同状态下系统应用的精确性。通过计算模型三维测量的线性距离值与真实距离值之间的差异及分布情况来检查测量数据的准确性与偏倚性。结果?在非缩放状态与缩放状态下操作误差分别为0.20?mm和0.09?mm，两者间差异有统计学意义（P<0.05）；摄像误差为0.283?mm，与同一组图像的测量结果相比较，差异无统计学意义（P>0.05）；经多次校正的误差为0.251?mm，与仅作一次校正的摄像误差比较，差异无统计学意义（P>0.05）。距离测量差异集中于±0.4?mm之间，准确性较高，无偏倚。结论??iWitness摄影测量系统在颌面部的标志点定位与点距测量上具有较高的可信度，可应用于面部形态的评估与记录。
목적：??통과대두부모형면부적측량분석，래연구iWitness섭영측량계통재합면부응용적정학성여준학성。방법??이용iWitness섭영측량계통중복획취두부모형표지점적삼유좌표치，래평고재불동상태하계통응용적정학성。통과계산모형삼유측량적선성거리치여진실거리치지간적차이급분포정황래검사측량수거적준학성여편의성。결과?재비축방상태여축방상태하조작오차분별위0.20?mm화0.09?mm，량자간차이유통계학의의（P<0.05）；섭상오차위0.283?mm，여동일조도상적측량결과상비교，차이무통계학의의（P>0.05）；경다차교정적오차위0.251?mm，여부작일차교정적섭상오차비교，차이무통계학의의（P>0.05）。거리측량차이집중우±0.4?mm지간，준학성교고，무편의。결론??iWitness섭영측량계통재합면부적표지점정위여점거측량상구유교고적가신도，가응용우면부형태적평고여기록。
Objective??This?study?aims?to?test?the?accuracy?and?precision?of?iWitness?photogrammetry?for?measuring?the?facial?tissues?of?mannequin?head. Methods??Under?ideal?circumstances,?the?3D?landmark?coordinates?were?repeatedly?obtained?from?a?mannequin?head?using?iWitness?photogrammetric?system?with?different?parameters,?to?examine?the?precision?of?this?system.?The?differences?between?the?3D?data?and?their?true?distance?values?of?mannequin?head?were?computed.?Results??Ope-rator?error?of?3D?system?in?non-zoom?and?zoom?status?were?0.20?mm?and?0.09?mm,?and?the?difference?was?significant?(P<0.05).?Image?captured?error?of?3D?system?was?0.283?mm,?and?there?was?no?significant?difference?compared?with?the?same?group?of images?(P>0.05).?Error?of?3D?system?with?recalibration?was?0.251?mm,?and?the?difference?was?not?statistically?significant?compared?with?image?captured?error?(P>0.05).?Good?congruence?was?observed?between?means?derived?from?the?3D?photos?and direct anthropometry, with difference ranging from ?0.4 mm to +0.4 mm.Conclusion??This?study?provides?further?evi-dence?of?the?high?reliability?of?iWitness?photogrammetry?for?several?craniofacial?measurements,?including?landmarks?and?inter-landmark?distances.?The?evaluated?system?can?be?recommended?for?the?evaluation?and?documentation?of?the?facial?surface.