The application of the context-adaptive entropy model significantly improves the rate-distortion (R-D) performance, in which hyperpriors and autoregressive models are jointly utilized to effectively capture the spatial redundancy of the latent representations. However, the latent representations still contain some spatial correlations. In addition, these methods based on the context-adaptive entropy model cannot be accelerated in the decoding process by parallel computing devices, e.g. FPGA or GPU. To alleviate these limitations, we propose a learned multi-resolution image compression framework, which exploits the recently developed octave convolutions to factorize the latent representations into the high-resolution (HR) and low-resolution (LR) parts, similar to wavelet transform, which further improves the R-D performance. To speed up the decoding, our scheme does not use context-adaptive entropy model. Instead, we exploit an additional hyper layer including hyper encoder and hyper decoder to further remove the spatial redundancy of the latent representation. Moreover, the cross-resolution parameter estimation (CRPE) is introduced into the proposed framework to enhance the flow of information and further improve the rate-distortion performance. An additional information-fidelity loss is proposed to the total loss function to adjust the contribution of the LR part to the final bit stream. Experimental results show that our method separately reduces the decoding time by approximately 73.35 % and 93.44 % compared with that of state-of-the-art learned image compression methods, and the R-D performance is still better than H.266/VVC(4:2:0) and some learning-based methods on both PSNR and MS-SSIM metrics across a wide bit rates.
OMR-NET: a two-stage octave multi-scale residual network for screen content image compression
School of software, Shandong University(山东大学软件学院);School of information science and engineering, Shandong University(山东大学信息科学与工程学院);School of Control Science and Engineering, Shandong University(山东大学控制科学与工程学院)
Dual-Octave Convolution for Accelerated Parallel MR Image Reconstruction
Harbin Institute of Technology (Shenzhen)(哈尔滨工业大学(深圳));Peng Cheng Laboratory(鹏城实验室);University of Electronic Science and Technology of China(电子科技大学);Inception Institute of Artificial Intelligence(人工智能起源研究所)
A Fast Fully Octave Convolutional Neural Network for Document Image Segmentation
Escola Politécnica de Pernambuco, Universidade de Pernambuco(伯南布哥大学伯南布哥理工学院);Centro de Informática, Universidade Federal de Pernambuco(伯南布哥联邦大学信息中心);Montreal Institute for Learning Algorithms, University of Montreal(蒙特利尔大学蒙特利尔学习算法研究所);Department of Chemical and Biological Engineering, Northwestern University(西北大学化学与生物工程系)
DONet: Dual-Octave Network for Fast MR Image Reconstruction
Harbin Institute of Technology (Shenzhen)(哈尔滨工业大学(深圳));University of Electronic Science and Technology of China(电子科技大学);Inception Institute of Artificial Intelligence(起源人工智能研究院);Nanjing University of Science and Technology(南京理工大学)
Pseudocylindrical Convolutions for Learned Omnidirectional Image Compression
University of Science and Technology of China(中国科学技术大学);City University of Hong Kong(香港城市大学);Harbin Institute of Technology, Shenzhen(哈尔滨工业大学(深圳));Shenzhen Institute of Artificial Intelligence and Robotics for Society(深圳市人工智能与机器人研究院)
An Integrated Representation & Compression Scheme Based on Convolutional Autoencoders with 4D DCT Perceptual Encoding for High Dynamic Range Light Fields
Indian Institute of Technology Madras(印度理工学院马德拉斯分校)
Efficient and Effective Context-Based Convolutional Entropy Modeling for Image Compression
The Hong Kong Polytechnic University(香港理工大学);Harbin Institute of Technology(哈尔滨工业大学);City University of Hong Kong(香港城市大学);The Chinese University of Hong Kong (Shenzhen)(香港中文大学(深圳));Shenzhen Research Institute of Big Data(深圳大数据研究院);Shenzhen Institute of Artificial Intelligence and Robotics for Society(深圳人工智能与机器人研究院)
LFIC-DRASC: Deep Light Field Image Compression Using Disentangled Representation and Asymmetrical Strip Convolution
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences(中国科学院深圳先进技术研究院);School of Electronics and Communication Engineering, Sun Yat-Sen University(中山大学电子与通信工程学院)