特征提取是手写体汉字识别的关键，目前四方向网格特征已被实验证实是一种较好的手写体汉字特征。
Feature extraction is the key part of handwritten Chinese character recognition. It is found that the directional feature dug by elastic mesh is suitable for Chinese character recognition.
文献报道的有两方向引发核、三方向引发核、四方向引发核、六方向引发核等结构新颖的树枝状分子。
Dendrimer of two branch core, three branch core, four branch core, six branch core, with original structure, have been reported in the literature.
该算法利用视频序列中各帧的四方向差分直方图度量隐写对空间相关性的影响，同时利用相邻帧帧间差分的直方图度量隐写对时间相关性的影响。
The algorithm uses a difference image histogram of four directions to measure the influence of spatial correlation, and temporal correlation is measured by the histogram of frame difference.
该算法利用视频序列中各帧的四方向差分直方图度量隐写对空间相关性的影响，同时利用相邻帧帧间差分的直方图度量隐写对时间相关性的影响。
The algorithm uses a difference image histogram of four directions to measure the influence of spatial correlation, and temporal correlation is measured by the histogram of frame difference.
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