论文标题
在特征域中匹配的多尺度贴片匹配学习的分布式图像压缩
Learned Distributed Image Compression with Multi-Scale Patch Matching in Feature Domain
论文作者
论文摘要
除了在经典图像压缩编解码器上实现较高的压缩效率外,还可以通过其他侧面信息(例如,从同一场景的不同角度来看另一个图像)改进深层图像压缩。为了更好地利用分布式压缩方案下的侧面信息,现有方法(Ayzik和Avidan 2020)仅在图像域上实现匹配的补丁,以解决由查看点差异引起的视差问题。但是,在图像域上匹配的贴片对由不同的视角引起的比例,形状和照明的差异并不强大,也无法完全使用侧面信息图像的丰富纹理信息。为了解决此问题,我们建议在分布式图像压缩模型的解码器上充分利用多尺度特征域补丁匹配(MSFDPM)。具体而言,MSFDPM由侧面信息特征提取器,多尺度特征域补丁匹配模块和多尺度特征融合网络组成。此外,我们重复使用层间相关性,从浅层层加速了深层的贴片匹配。最后,我们认为,与图像域(Ayzik和Avidan 2020)的贴片匹配方法相比,在多尺度特征域中的匹配进一步提高了压缩率约20%。
Beyond achieving higher compression efficiency over classical image compression codecs, deep image compression is expected to be improved with additional side information, e.g., another image from a different perspective of the same scene. To better utilize the side information under the distributed compression scenario, the existing method (Ayzik and Avidan 2020) only implements patch matching at the image domain to solve the parallax problem caused by the difference in viewing points. However, the patch matching at the image domain is not robust to the variance of scale, shape, and illumination caused by the different viewing angles, and can not make full use of the rich texture information of the side information image. To resolve this issue, we propose Multi-Scale Feature Domain Patch Matching (MSFDPM) to fully utilizes side information at the decoder of the distributed image compression model. Specifically, MSFDPM consists of a side information feature extractor, a multi-scale feature domain patch matching module, and a multi-scale feature fusion network. Furthermore, we reuse inter-patch correlation from the shallow layer to accelerate the patch matching of the deep layer. Finally, we nd that our patch matching in a multi-scale feature domain further improves compression rate by about 20% compared with the patch matching method at image domain (Ayzik and Avidan 2020).