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Laser speckle contrast imaging based on uniting spatiotemporal Fourier transform
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作者 翟林君 杜永兆 +2 位作者 吴循循 刁勇 傅玉青 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第1期98-104,共7页
We propose a laser speckle contrast imaging method based on uniting spatiotemporal Fourier transform.First,the raw speckle images are entirely transformed to the spatiotemporal frequency domain with a three-dimensiona... We propose a laser speckle contrast imaging method based on uniting spatiotemporal Fourier transform.First,the raw speckle images are entirely transformed to the spatiotemporal frequency domain with a three-dimensional(3D)fast Fourier transform.Second,the dynamic and static speckle components are extracted by applying 3D low-pass and high-pass filtering in the spatiotemporal frequency domain and inverse 3D Fourier transform.Third,we calculate the time-averaged modulation depth with the average of both components to map the two-dimensional blood flow distribution.The experiments demonstrate that the proposed method could effectively improve computational efficiency and imaging quality. 展开更多
关键词 uniting spatiotemporal Fourier transform laser speckle contrast image fluctuation modulation 3D Fourier transform
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