计算机科学 ›› 2025, Vol. 52 ›› Issue (5): 171-178.doi: 10.11896/jsjkx.240200020
苗壮, 崔浩然, 张启阳, 王家宝, 李阳
MIAO Zhuang, CUI Haoran, ZHANG Qiyang, WANG Jiabao, LI Yang
摘要: 大气湍流引起的图像退化严重影响了目标检测和图像识别等计算机视觉下游任务的性能。现有基于深度学习的大气湍流退化图像复原模型虽然取得了较好的效果,但未充分利用湍流效应的特征信息。为了获得更好的复原效果,提出了一种基于对比度学习的大气湍流退化图像复原方法。针对大气湍流退化引起的模糊与扭曲,设计了湍流缓解块。该块融合了基于Transformer的通道信息交互模块与基于CNN的空间信息交互模块,在全局和局部层面上抑制湍流对图像的干扰。同时,引入对比学习,将清晰图像和大气湍流退化图像视为正样本和负样本,在特征空间中拉近大气湍流复原网络的输出与正样本的距离,推远与负样本的距离,更有效地进行特征提取和图像复原。在Helen合成测试集和Places合成测试集上,所提方法分别达到了26.78 dB,22.42 dB的PSNR和0.790 9,0.682 0的SSIM,与现有的5种方法相比达到了最佳效果,更适用于提升大气湍流退化图像的质量。
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