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Method for modifying spatial resolution in the resolution in the reconstruction of images in digital holography
Method for modifying spatial resolution in the resolution in the reconstruction of images in digital holography
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机译：在数字全息术中重建图像的分辨率中修改空间分辨率的方法
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摘要
The invention concerns a method Method for the reconstruction of holographic images, the holographic image being detected by an image detection device (9), the holographic image being transformed in a digitized hologram (10), the digitized hologram (10) being comprised of a number Vr of elementary pixels, the size of which being equal to the holographic image sampling intervals, and of the Vr values (51) respectively associated to the elementary pixels, the method comprising a first step (11,12) of processing the digitized hologram array, and a second step (13,15,16,17,18) of hologram reconstruction in the observation plane starting from the digitized hologram processed in the first step, the method being characterised in that the second step is carried out through discrete Fresnel Transform applied on an array of Ve values corresponding to pixels having size equal to that of said elementary pixels, wherein said array of Ve values (50, 51) includes said array of Vr values and an integer number p=Ve−Vr0 of constant values (50) equal to OS, said number Ve of values being inversely proportional to the desired pixel size to be obtained for the reconstructed image (14). The invention further concerns the instruments necessary to the execution of the method and the apparatus executing it.
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机译：本发明涉及一种用于重建全息图像的方法，其中，通过图像检测装置（ 9 ）检测全息图像，并将全息图像转换为数字化全息图（ 10 ），数字化全息图（ 10 ）由数量为V r 的基本像素组成，其大小等于全息图像采样间隔，并且分别与基本像素关联的V r 值（ 51 ），该方法包括处理数字化的第一步（ 11,12 ）全息图阵列，以及从第一步中处理的数字化全息图开始，在观察平面中进行全息图重建的第二步（ 13,15,16,17,18 ）第二步是通过对与尺寸等于所述基本像素大小的像素相对应的V e 值数组进行离散菲涅耳变换进行的，其中， V e 值数组（ 50、51 ）包括V r 值的数组和整数p = V e <等于OS的常量值（ 50 ）的/ Sub> -V r ，表示数量V e 值与要为重建图像（ 14 ）获得的所需像素大小成反比。本发明还涉及执行该方法所需的仪器和执行该方法的设备。
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