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    • 50. 发明授权
    • Speckle noise reduction based on longitudinal shift of sample
    • 基于样品纵向偏移的散斑降噪
    • US08687253B2
    • 2014-04-01
    • US13324845
    • 2011-12-13
    • Chung-Chieh YuIsao MatsubaraMamoru Miyawaki
    • Chung-Chieh YuIsao MatsubaraMamoru Miyawaki
    • G03H1/26
    • G03H1/0443G03H1/32G03H2001/0456G03H2001/0825G03H2001/2655G03H2227/03
    • A method and apparatus for reducing speckle noise in an image of an object are disclosed. The method includes, placing the object in an interferometer at a first position along a beam path of an object beam, irradiating the object with the object beam, moving the object from the first position to a second position by longitudinally shifting the object along the beam path of the object beam, irradiating the object with the object beam at the second position. At each of the first and second positions a holographic image formed by interference between the object beam and a reference beam is recorded. An object image with reduced speckle noise is obtained by averaging the holographic images. Either an arithmetic mean or a weighted average may be used in the averaging of the holographic images.
    • 公开了一种用于减少物体的图像中的斑点噪声的方法和装置。 该方法包括:将物体沿着物体光束的光束路径放置在干涉仪的第一位置,用物体光束照射物体,通过沿着光束纵向移动物体将物体从第一位置移动到第二位置 物体光束的路径,在物体光束的第二位置照射物体。 在第一和第二位置的每一个处记录由物体光束和参考光束之间的干涉形成的全息图像。 通过平均全息图像获得具有减少的斑点噪声的对象图像。 在全息图像的平均中可以使用算术平均值或加权平均值。