Improving the Robustness of Real-Time Myoelectric Pattern Recognition against Arm Position Changes in Transradial Amputees

Figure 2

Three classifier configurations. (a) Single-position classifier (SPC). (b) Cascade classifier (CC). CC was composed of seven position classifiers in the first stage and five motion classifiers in the second stage. Each position classifier was trained by ACC signals of each movement, and each motion classifier was trained by EMG recordings from each arm position. In real-time test, the output of the first stage was firstly determined by the most frequently occurring outputs of the seven position classifiers and then used to select a corresponding motion classifier. (c) Multiposition classifier (MPC).

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(b)

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