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研究和分析了形态学梯度算子,提出了一种适合X射线数字图像边缘检测的多尺度形态学梯度算子；这种算子的取值来自于膨胀梯度图和腐蚀梯度图中同位置像素的最小值,它结合了膨胀和腐蚀的优点,也考虑了X射线数字图像对比度低的特点；实验证明这是一种检测X射线数字图像边缘的有效方法。
In this paper, a morphological gradient operator is studied and analyzed. A multi-scale morphological gradient operator suitable for edge detection of X-ray digital images is proposed. The value of this operator comes from the relationship between the expansion gradient and the same position pixel It combines the advantages of expansion and erosion with the low contrast of X-ray digital images. Experiments show that this method is an effective method to detect the edge of X-ray digital images.