To segment a vehicle license card from the image background of the whole vehicle, a image segmentation algorithm basing on cross variance and Mathematical morphology is presented.
针对汽车牌照与车身背景的分割问题，提出一种基于横向方差和数学形态学的图像分割方法。
An improved algorithm of the traditional fingerprint image segmentation algorithm-variance method is proposed.
提出了一种传统的指纹图像分割算法——方差法的改进算法。
In selective masking smoothing algorithm, it is needed to calculate grayscale average and variance of a large number of image Windows.
在选择掩模平滑算法中，需要计算一幅图像的大量局部窗口的灰度均值和方差。
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