A Target-Orientated Marker Image Binarization Method for Orthopaedic Surgical Navigation System |
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| Authors: | YAN Shi-ju CHEN Xiao-jun WANG Cheng-tao SU Ying-ying XIA Qing |
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| Affiliation: | 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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