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我正在尝试实现以下论文中指定的算法（第 3 节：岭候选提取部分）。
http://ai.pku.edu.cn/aiwebsite/research.files/collected%20papers%20-%20palmprint/Feature%20extraction%20method%20for%20palmprint%20considering%20elimination%20of%20creases.pdf
但是在继续进行时，在应用高斯滤波器时会产生很多负数和非常小的数字。OpenCV 中是否有用于此类操作的预定义函数？