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Focus measure based on the energy of high-frequency components in the S transform

机译：基于S变换中高频分量能量的聚焦测量

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摘要

Focus measure plays a fundamental role in the shape from focus technique. In this Letter, we suggest a focus measure in the S-transform domain that is based on the energy of high-frequency components. A localized spectrum by using variable window size provides a more accurate method of measuring image sharpness as compared to other focus measures proposed in spectral domains. An optimal focus measure is obtained by selecting an appropriate frequency-dependent window width. The performance of the proposed focus measure is compared with those of existing focus measures in terms of three-dimensional shape recovery. Experimental results demonstrate the effectiveness of the proposed focus measure.
机译：聚焦测量在聚焦技术中起着至关重要的作用。在这封信中，我们建议基于高频分量的能量在S变换域中进行重点测量。与在光谱域中提出的其他聚焦措施相比，通过使用可变窗口大小的局部光谱提供了一种更精确的图像清晰度测量方法。通过选择适当的频率相关窗口宽度，可以获得最佳的聚焦度量。在三维形状恢复方面，将拟议的聚焦措施的性能与现有聚焦措施的性能进行了比较。实验结果证明了所提出的重点措施的有效性。

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  • 来源
    《Optics Letters》 |2010年第8期|p.1272-1274|共3页
  • 作者

    Muhammad Tariq Mahmood1 and Tae-Sun Choi1*;

  • 作者单位

    1School of Information and Mechatronics, Gwangju Institute of Science and Technology, 261 Cheomdan Gwagiro, Buk-Gu, Gwangju 500-712, Korea;

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