| A Target-Orientated Marker Image Binarization Method for Orthopaedic Surgical Navigation System |
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| 作者姓名： | 闫士举 陈晓军 王成焘 苏颖颖 夏庆 |
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| 作者单位： | Life Quality via Mechanical Eng.Institute School of Mechanical Eng.，Shanghai Jiaotong Univ.，Life Quality via Mechanical Eng.Institute，School of Mechanical Eng.，Shanghai Jiaotong Univ.，Life Quality via Mechanical Eng.Institute，School of Mechanical Eng.，Shanghai Jiaotong Univ.，Life Quality via Mechanical Eng.Institute，School of Mechanical Eng.，Shanghai Jiaotong Univ.，Orthopaedics，Zhongshan Hospital Affiliated to Fudan Univ.，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200433 China |
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| 基金项目： | Project of Science and Technology Committee of Shanghai Municipality (No.2528(3)) |
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| 摘 要： | Camera calibration is the key technique in a C-arm based orthopaedic surgical navigation system. The extraction of marker location information is a necessary step in the calibration process. Ideal marker images should possess uniform background and contain marker shadow only, but in fact marker images always possess nonuniform background and are contaminated by noise and unwanted anatomic information, making the extraction very difficult. A target-orientated marker shadow extraction method was proposed. With this method a proper threshold for marker image binarization can be determined.
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| 关 键 词： | 整形外科手术 标记图象 照相机校准 比例值 |
| 文章编号： | 1007-1172（2007）01-0018-05 |
| 修稿时间： | 2005-10-21 |
A Target-Orientated Marker Image Binarization Method for Orthopaedic Surgical Navigation System |
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| YAN Shi-ju,CHEN Xiao-jun,WANG Cheng-tao,SU Ying-ying,XIA Qing.A Target-Orientated Marker Image Binarization Method for Orthopaedic Surgical Navigation System[J].Journal of Shanghai Jiaotong university,2007,12(1):18-22. |
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| Authors: | YAN Shi-ju CHEN Xiao-jun WANG Cheng-tao SU Ying-ying XIA Qing |
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| Institution: | 1. Life Quality via Mechanical Eng. Institute, School of Mechanical Eng. ,Shanghai Jiaotong Univ. , Shanghai 200030, China
2. Orthopaedics, Zhongshan Hospital Affiliated to Fudan Univ. , Shanghai 200433, China |
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| Abstract: | Camera calibration is the key technique in a C-arm based orthopaedic surgical navigation system. The extraction of marker location information is a necessary step in the calibration process. Ideal marker images should possess uniform background and contain marker shadow only, but in fact marker images always possess nonuniform background and are contaminated by noise and unwanted anatomic information, making the extraction very difficult. A target-orientated marker shadow extraction method was proposed. With this method a proper threshold for marker image binarization can be determined. |
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| Keywords: | C-arm orthopaedic surgery marker image binarization gray-scale threshold |
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