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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。
The morphological gradient operator is studied and analyzed, and a multi-scale morphological gradient operator suitable for X-ray digital image edge detection is proposed. The value of this operator comes from the minimum value of co-located pixels in the dilation and erosion gradients, which combines the advantages of dilation and erosion with the low contrast of X-ray digital images. Experiments show that this is an effective method to detect the edge of X-ray digital images.