探索、寻找描述、刻画地震前兆复杂图像演化特征的方法与指标，是地震预报研究的新课题。
It is a new subject to explore and look for the methods and indexes to describe and depict the evolutional characteristics of seismic precursor complex picture.
研究结果表明，烧伤表面图像的色度方差具有明显特征，可以作为烧伤程度的评价指标。
It is found that the variance in the chroma of the surface image is of significant characteristic, and that it can be used as an index to evaluate the burn degree.
在实验数据的基础上，对工件表面纹理图像的特征参数进行提取，提出采用相对距离作为刀具磨损程度的评价指标。
Using the experimental data, feature parameters of workpiece surface texture images were extracted. Relative distance was presented to evaluate the wear degree of cutting tools.
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