The extracted objects with different ranges usually have different distribution of gray scale value, due to uneven distribution of light and various properties of the crack background of fingerprints.
由于光线分布不均匀或斑块噪音干扰等原因，往往使所要处理的指纹的灰度值分布缺乏均匀性。
The extracted objects with different ranges usually have different distribution of gray scale value, due to uneven distribution of light and various properties of the crack background of fingerprints.
由于光线分布不均匀或斑块噪音干扰等原因，往往使所要处理的指纹的灰度值分布缺乏均匀性。
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