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A new and general approach to signal denoising and eye movement classification based on segmented linear regression

机译:基于分段线性回归的信号去噪和眼动分类的通用新方法

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摘要

We introduce a conceptually novel method for eye-movement signal analysis. The method is general in that it does not place severe restrictions on sampling frequency, measurement noise or subject behavior. Event identification is based on segmentation that simultaneously denoises the signal and determines event boundaries. The full gaze position time-series is segmented into an approximately optimal piecewise linear function in O(n) time. Gaze feature parameters for classification into fixations, saccades, smooth pursuits and post-saccadic oscillations are derived from human labeling in a data-driven manner. The range of oculomotor events identified and the powerful denoising performance make the method useable for both low-noise controlled laboratory settings and high-noise complex field experiments. This is desirable for harmonizing the gaze behavior (in the wild) and oculomotor event identification (in the laboratory) approaches to eye movement behavior. Denoising and classification performance are assessed using multiple datasets. Full open source implementation is included.
机译:我们介绍了一种用于眼动信号分析的概念新颖的方法。该方法是通用的,因为它对采样频率,测量噪声或对象行为没有严格限制。事件识别基于分段,该分段同时对信号进行降噪并确定事件边界。完整的凝视位置时间序列被分割为O(n)时间的近似最佳分段线性函数。凝视特征参数可通过数据驱动方式从人类标签中得出,以将其分类为注视点,扫视点,平滑追随和声后震荡。所识别的动眼事件范围和强大的降噪性能使该方法可用于低噪声控制的实验室环境和高噪声复杂现场实验。这对于协调注视行为(在野外)和动眼事件识别(在实验室中)对眼睛运动行为的方法而言是理想的。使用多个数据集评估去噪和分类性能。包括完整的开源实现。

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