The segmented function has always been emphasis and difficulty in higher mathematics teaching.
分段函数一直是高等数学教学中的重点和难点内容。
For the bar image segmented bilinear transformation function is used to restore the bar image.
对分割出的图像，采用双线性变换函数来实现目标的校正。
The gray-gradient co-occurrence matrix of the text region is calculated, and the optimum thresholds of segmented grayscale and gradient are found quickly according to the objective function.
首先计算文本区域的灰度-梯度共生矩阵，并根据目标函数快速地找到分割的灰度和梯度最佳阈值；
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