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Quantization of dynamic speckle patterns with spatially varying statistics

机译:具有空间变化统计的动态散斑模式的量化

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摘要

Raw data compression is mandatory for monitoring of processes by dynamic speckle analysis when two-dimensional activity maps are built by pointwise statistical processing of correlated speckle patterns formed on the surface of diffusely reflecting objects under laser illumination. Coarse quantization of speckle patterns enables storage and transfer of a huge amount of images, but it may be inefficient at spatially varying speckle statistics, such as for patterns recorded at non-uniform illumination or reflectivity. We prove efficacy of coarse quantization of the raw speckle data with varying statistics for a normalized algorithm by simulation and a polymer drop drying experiment. Both uniform and non-uniform quantization are proposed for treating such data. Decreasing the bit depth from 8 to 3 is possible without worsening the quality of the activity map. (C) 2020 Optical Society of America
机译:当通过对激光照明下漫反射物体表面上形成的相关散斑图案进行逐点统计处理来构建二维活动图时,必须对原始数据进行压缩,以便通过动态散斑分析来监测过程。散斑图案的粗略量化能够存储和传输大量图像,但在空间变化的散斑统计数据(例如在非均匀照明或反射率下记录的图案)下,它可能效率低下。通过模拟和聚合物滴干燥实验,我们证明了归一化算法对原始散斑数据进行粗量化的有效性。提出了均匀和非均匀量化两种方法来处理这类数据。将位深度从8降低到3是可能的,而不会恶化活动图的质量。(C) 2020美国光学学会

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  • 来源
    《Applied optics》 |2021年第4期|共11页
  • 作者单位

    Bulgarian Acad Sci Inst Opt Mat &

    Technol Acad G Bonchev Bl 109 Sofia 1113 Bulgaria;

    Bulgarian Acad Sci Inst Opt Mat &

    Technol Acad G Bonchev Bl 109 Sofia 1113 Bulgaria;

    Bulgarian Acad Sci Inst Opt Mat &

    Technol Acad G Bonchev Bl 109 Sofia 1113 Bulgaria;

    Bulgarian Acad Sci Inst Opt Mat &

    Technol Acad G Bonchev Bl 109 Sofia 1113 Bulgaria;

    Bulgarian Acad Sci Inst Opt Mat &

    Technol Acad G Bonchev Bl 109 Sofia 1113 Bulgaria;

    Elect &

    Telecommun Res Inst 218 Gajeong Ro Daejeon 34129 South Korea;

    Elect &

    Telecommun Res Inst 218 Gajeong Ro Daejeon 34129 South Korea;

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