Every child image of the local regions is calculated, and the best threshold value of child image with the method of the biggist proportion of squase deviations is calculated.
对子图像进行局部直方图计算，由最大方差比例阈值确定方法计算出子图像的最佳阈值。
Then, the best threshold value is calculated basing on the gradient magnitude mean and the variance of the image.
再由图像的梯度幅值均值和方差计算出图像的最佳阈值。
After researching the image segmentation, we get the two-value image of the image of down with the threshold of it.
以及图像分割技术的研究，用最佳的阈值对羽绒图像进行阈值分割，得到满足羽绒检测要求的二值图像。
The optimum threshold value was obtained and accurate segmentation of hydrophobic image was realized, which can meet the need of the classification of hydrophobicity levels based on BP neural network.
采用基于最大类间方差的遗传分割法通过反复迭代搜索得到较优的分割阈值，实现了憎水性图像的准确分割，可满足后续基于BP神经网络的憎水性等级的判定。
An approach for color image gray processing based on threshold of gray scale statistic mean value and global standard deviation of each color component is presented.
给出了一种基于图像各彩色分量灰度统计特征期望值和全局标准差作为阈值的彩色图像灰度化方法。
For the method, the threshold value matrix of a second screen with a different screen Angle and width is read out and compared with the color values of a halftone image presented.
对于该方法，将具有不同加网角度和加网线数的第二网屏的阈值矩阵读出并且与所提供的半色调图像的色值比较。
For the method, the threshold value matrix of a second screen with a different screen Angle and width is read out and compared with the color values of a halftone image presented.
对于该方法，将具有不同加网角度和加网线数的第二网屏的阈值矩阵读出并且与所提供的半色调图像的色值比较。
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