改进Canny算子在工业影像清晰度评价中的应用研究

来源 :重庆师范大学学报(自然科学版) | 被引量 : 12次 | 上传用户:wangkaixin
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【目的】为了实现不同离焦和正焦图片边缘检测中高低阈值的自适应确定。【方法】提出一种基于改进Canny算子的自动对焦清晰度评价函数。该函数利用传统Canny边缘检测算子的运算迅速、抗噪性强和精度高的特点,将模糊熵应用于Canny算子高低阈值的自适应确定,并用图像边缘点的模糊熵和作为图像清晰度评价值。【结果】在工业影像测量自动对焦系统中,算法的有效性得到了验证。【结论】试验结果表明,清晰度评价函数在满足单峰性和无偏性的前提下,具有较高的实时性,以及对环境较强的适应性,能够满足工业测量系统中对自动对焦的需求。
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