The preprocessing approach of reference digital map normalization using subtracting local mean value and its applications worth is also discussed.
讨论了基准数字地图局部零均值化预处理的方法和应用价值。
For the regions in image where gray value is high or change intensely, local mean value and variance is adopted to control enhancement coefficients.
针对图像中的高灰度区和灰度剧变区，应用图像局部均值和方差自适应调节增强系数。
For regions with high grey-scale level or with tensely variable grey level, the image enhancement coefficients shall be adaptively controlled based on local mean value and variance.
针对图像中的高灰度区和灰度剧变区，应用图像局部均值和方差自适应调节增强系数。
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