数字全息再现像中零级干扰噪声消除及图像增强研究

Zero-order Image Elimination in Digital Holography by Means of Image Processing

利用基于图像处理的微分梯度方法预先对数字全息图进行空间域的图像增强操作 ,可以达到消除全息再现时的零级衍射干扰的目的 它无需其它辅助设备或多次全息记录 ,是一种方便简洁的处理方法 在理论分析和数字再现结果中都表明 ,该方法不仅能够有效地消除零级衍射像 。

A new method to eliminate the zero-order disturbance in reconstruction of digital hologram is proposed in this paper. The method is based on digital image processing free of any extra optical element, and proved to be simple and advantageous to improvement of the desired image quality. The theoretical analysis is given and digital experimental results presented.