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在数字全息再现像过程中,受到噪声干扰,再现像质量差,对比度低。为了解决当前数字全息再现像方法的缺陷,获得更优的数字全息再现像质量,提出基于轮廓波变换的数字全息再现像质量改善方法。首先采用小波变换去除数字全息再现像噪声,然后采用轮廓波变换方法对数字全息再现像再次去噪,最后采用数字全息再现像实验进行可行性分析。结果表明,本文方法有效去除数字全息再现像的噪声,获得了理想的数字全息再现像,有利于后续的数字全息再现像处理。
In the process of digital holographic reproduction, it is affected by noise, poor quality of reproduced image and low contrast. In order to solve the defect of current digital holographic reconstruction method and to obtain better digital holographic reproduction image quality, a digital holographic reconstruction image quality improvement method based on contourlet transform is proposed. Firstly, the digital holographic reconstructed image noise is removed by using wavelet transform, and then the digital holographic reconstructed image is denoised again by contourlet transform. Finally, the feasibility of digital holographic reconstructed image experiment is analyzed. The results show that the method proposed in this paper can effectively remove the noise of the digital holographic reconstructed image and obtain the ideal digital holographic reconstructed image, which is beneficial to the subsequent digital holographic reconstructed image processing.