arXiv:2503.23862cs.CVcs.AI2025-03被引 2

用深度学习压缩病理图像,省空间还保细节。

Learned Image Compression and Restoration for Digital Pathology

  • 用可学习的升维变换分解图像,结构化编码特征
  • 在病理数据集上实现更优率失真性能,压缩率更高
  • 适合医学影像存储与AI诊断系统集成使用

数字病理图像在医疗诊断中至关重要,但其超高清分辨率和大文件尺寸给存储、传输和实时可视化带来挑战。为此,我们提出专为全幻灯片图像(WSIs)设计的深度学习压缩框架CLERIC。CLERIC在分析阶段采用可学习的提升变换,将图像分解为低频与高频分量,生成更具结构化的潜在表示;通过并行编码器融合可变形残差块(DRB)与循环残差块(R2B),增强特征提取与空间适应性;合成阶段应用逆提升变换实现高效图像重建,确保细微组织结构的高保真还原。我们在数字病理图像数据集上评估了CLERIC,并与当前最先进的学习型图像压缩(LIC)模型对比。实验结果表明,CLERIC在率失真(RD)性能上表现更优,显著降低存储需求的同时保持高诊断质量。本研究展示了深度学习压缩在数字病理中的潜力,有助于实现高效数据管理与长期存储,同时无缝集成至临床工作流及人工智能辅助诊断系统。代码与模型已开源:https://github.com/pnu-amilab/CLERIC。

原文摘要 · Abstract (English)

Digital pathology images play a crucial role in medical diagnostics, but their ultra-high resolution and large file sizes pose significant challenges for storage, transmission, and real-time visualization. To address these issues, we propose CLERIC, a novel deep learning-based image compression framework designed specifically for whole slide images (WSIs). CLERIC integrates a learnable lifting scheme and advanced convolutional techniques to enhance compression efficiency while preserving critical pathological details. Our framework employs a lifting-scheme transform in the analysis stage to decompose images into low- and high-frequency components, enabling more structured latent representations. These components are processed through parallel encoders incorporating Deformable Residual Blocks (DRB) and Recurrent Residual Blocks (R2B) to improve feature extraction and spatial adaptability. The synthesis stage applies an inverse lifting transform for effective image reconstruction, ensuring high-fidelity restoration of fine-grained tissue structures. We evaluate CLERIC on a digital pathology image dataset and compare its performance against state-of-the-art learned image compression (LIC) models. Experimental results demonstrate that CLERIC achieves superior rate-distortion (RD) performance, significantly reducing storage requirements while maintaining high diagnostic image quality. Our study highlights the potential of deep learning-based compression in digital pathology, facilitating efficient data management and long-term storage while ensuring seamless integration into clinical workflows and AI-assisted diagnostic systems. Code and models are available at: https://github.com/pnu-amilab/CLERIC.

图像压缩病理影像深度学习医学图像

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