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| Visual Force Measurement Using Pseudo Zernike Moment Invariants |
| HU Wen-1, LIU Hong-Tao-1, HU Chun-2, FAN Ming-Xia-3, MO Jin-Qiu-1, WANG Shi-Gang-1 |
| (1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China;2. Center for Educational Technology, Jiangxi Science and Technology Normal University, Nanchang 330013, China; 3. Shanghai Key Lab. of Magnetic Resonance, East China Normal University, Shanghai 200062, China) |
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Abstract A new visual force measurement method was proposed to measure applied forces through analyzing pseudo Zernike moment invariants. First, a feature vector of pseudo Zernike moment invariants is used to describe the deformed microgripper shape in microassembly. This description indicates a function between the applied force and the feature vector of moment invariants. Then, a training set is established, where the input and the output represent the feature vector of moment invariants and the corresponding known applied force, respectively. Finally, a support vector machine (SVM) compares the feature vectors in the testing set with those ones in the training set, implements multiclass classification and estimates unknown applied forces in the testing set. The experiments on four different microcantilevers validate the proposed method.
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Received: 05 June 2012
Published: 28 April 2013
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