Then, the candidate audio segments for embedding watermark are defined by using the feature points.

然后以音频特征点为标识，确定用于水印嵌入的候选音频段；

youdao

The feature points are clustered in this subspace using a graph spectral approach.

的特征点都聚集在此子空间使用的光谱的曲线图的方法。

youdao

The main methods adopted include:1) watermark synchronization is achieved by invariant local circular regions which can be generated using image locally most stable feature points;

采取的主要方法有：1）利用图像中的局部最稳定特征点生成具有几何不变性的圆形特征区域，用于水印的同步；

youdao

This is a nice feature, but unfortunately sometimes is required because touching small points on the screen do not respond without using the pen.

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