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fix: Typo
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YDX-2147483647 committed Jun 20, 2023
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2 changes: 1 addition & 1 deletion docs/course/digital-image-processing.md
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Expand Up @@ -265,7 +265,7 @@ Opening $A \circ B \coloneqq (A \ominus B) \oplus B$, closing $A \bullet B \colo

| 操作 | 作用 |
| :---------------: | :----------------: |
| erosion, opening | 清楚细物,断开窄桥 |
| erosion, opening | 清除细物,断开窄桥 |
| dilution, closing | 填充孔洞,连接断口 |

若结构元光滑(如圆盘),则 opening, closing 也会让图形光滑,二者区别在于 opening 只对凸处有效,而 closing 只对凹处有效。(它们对偶)
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