1.智能感知与控制四川省重点实验室,四川 宜宾 644005
2.四川轻化工大学 物理与电子工程学院,四川 宜宾 644005
蒙明伟(2000— ),男,硕士研究生,从事数字全息,图像处理方面的研究。1917608295@qq.com
蒋行国1973— ),男,副教授,博士,从事信号处理方面的研究。tonny_jiang@suse.edu.cn
收稿:2025-09-19,
修回:2025-10-31,
纸质出版:2026-01-20
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蒙明伟,蒋行国.基于残差注意力机制的离轴数字全息重建[J].光学技术,2026,52(01):61-67.
MENG Mingwei,JIANG Xingguo.Off-axis digital holographic reconstruction based on residual attention mechanism[J].OPTICAL TECHNIQUE,2026,52(01):61-67.
离轴数字全息重建具有重要应用价值,但重建方法仍较为有限,面临零级衍射干扰,计算复杂度高以及重建精度受限等问题。针对这些问题,论文提出一种基于残差注意力机制的离轴数字全息重建方法。首先采用优化后的U-Net模型作为网络架构,并使用模拟生成的离轴菲涅尔全息图进行训练。然后,通过改进U-Net模型中的编码器和解码器结构,以提升网络特征提取能力,从而能够实现高质量的离轴数字全息图重建。最终,为进一步验证该模型的抗噪声性能,保持网络结构和参数不变,使用含噪声的数据集进行重建,并对重建结果进行质量评估。实验结果表明,相较于最优对比算法,改进后的网络在数据集上的平均SSIM和PSNR分别提高了2.97%和15.52%,而在加噪数据集上平均SSIM和PSNR则分别提高了6.48%和19.04%。显著提升了离轴数字全息重建的质量和抗噪性能,为复杂光学成像问题提供了有效的深度学习解决方案。
Off-axis digital holographic reconstruction holds significant practical value
yet existing methods remain limited due to challenges such as zero-order diffraction interference
high computational complexity
and restricted reconstruction accuracy. To address these issues
an off-axis digital holographic reconstruction method based on residual attention mechanisms is proposed. The study first employs an optimized U-Net model architecture and utilizes simulated off-axis Fresnel holograms for training. Subsequently
the encoder-decoder structures in the U-Net model are enhanced to improve feature extraction capabilities
enabling high-quality reconstruction of off-axis digital holograms. Finally
to validate the model's noise resistance
reconstruction was performed using noisy datasets while maintaining the original network structure and parameters
with quality assessments conducted on reconstructed results. Experimental results demonstrate that compared to the optimal reference algorithm
the improved network achieves 2.97% higher average SSIM and 15.52% better PSNR performance on standard datasets. Notably
it shows 6.48% and 19.04% improvements in average SSIM and PSNR across noisy datasets.The quality and noise reduction performance of off-axis digital holographic reconstruction are significantly improved
and an effective deep learning solution is provided for complex optical imaging problems.
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