Microscopic particles within an optical hologram reconstruction have been successfully measured using an image digitizer and a PC/AT computer. The hologram was recorded during a test burn of some solid rocket fuel and captured a 2 in x 2 in volume of burning particles as they lift from the fuel surface during combustion. The computer processes the digitized images using feature identification algorithms and sizing in the feature's horizontal dimension, its vertical dimension and area. The operation of the algorithms have been validated against calibration objects. Statistical tests show that about 1,300 particles from several image frames are required to obtain a representative size distribution. Overlying speckle degrades the resolution of the image and can be reduced by a variety of techniques. The performance of these speckle-reduction techniques has been measured and compared in the areas of speckle reduction, loss of resolution, and processing time. Program sizes and processing times have been compared for both FORTRAN and C language versions of the processing program
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机译：使用图像数字化仪和PC / AT计算机已成功测量了光学全息图重建过程中的微小颗粒。全息图是在测试某些固体火箭燃料的燃烧过程中记录的，并捕获了燃烧过程中从燃料表面升起的燃烧颗粒中2 x 2的体积。计算机使用特征识别算法处理数字化图像，并按特征的水平尺寸，垂直尺寸和面积进行尺寸调整。该算法的操作已针对校准对象进行了验证。统计测试表明，需要几个图像帧中的约1300个粒子才能获得具有代表性的尺寸分布。上方的斑点会降低图像的分辨率，并且可以通过多种技术降低斑点。这些斑点减少技术的性能已在斑点减少，分辨率降低和处理时间方面进行了测量和比较。已经比较了FORTRAN和C语言版本的处理程序的程序大小和处理时间
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