Search Results for author: Hongwei Qin

Found 39 papers, 16 papers with code

Task-Aware Encoder Control for Deep Video Compression

no code implementations7 Apr 2024 Xingtong Ge, Jixiang Luo, Xinjie Zhang, Tongda Xu, Guo Lu, Dailan He, Jing Geng, Yan Wang, Jun Zhang, Hongwei Qin

Prior research on deep video compression (DVC) for machine tasks typically necessitates training a unique codec for each specific task, mandating a dedicated decoder per task.

Video Compression

Super-High-Fidelity Image Compression via Hierarchical-ROI and Adaptive Quantization

no code implementations19 Mar 2024 Jixiang Luo, Yan Wang, Hongwei Qin

MSE-based models aim to improve objective metrics while generative models are leveraged to improve visual quality measured by subjective metrics.

Image Compression Quantization

GaussianImage: 1000 FPS Image Representation and Compression by 2D Gaussian Splatting

1 code implementation13 Mar 2024 Xinjie Zhang, Xingtong Ge, Tongda Xu, Dailan He, Yan Wang, Hongwei Qin, Guo Lu, Jing Geng, Jun Zhang

In response, we propose a groundbreaking paradigm of image representation and compression by 2D Gaussian Splatting, named GaussianImage.

Quantization

Boosting Neural Representations for Videos with a Conditional Decoder

1 code implementation28 Feb 2024 Xinjie Zhang, Ren Yang, Dailan He, Xingtong Ge, Tongda Xu, Yan Wang, Hongwei Qin, Jun Zhang

Implicit neural representations (INRs) have emerged as a promising approach for video storage and processing, showing remarkable versatility across various video tasks.

Idempotence and Perceptual Image Compression

1 code implementation17 Jan 2024 Tongda Xu, Ziran Zhu, Dailan He, Yanghao Li, Lina Guo, Yuanyuan Wang, Zhe Wang, Hongwei Qin, Yan Wang, Jingjing Liu, Ya-Qin Zhang

However, we find that theoretically: 1) Conditional generative model-based perceptual codec satisfies idempotence; 2) Unconditional generative model with idempotence constraint is equivalent to conditional generative codec.

Image Compression

Unified learning-based lossy and lossless JPEG recompression

no code implementations5 Dec 2023 Jianghui Zhang, Yuanyuan Wang, Lina Guo, Jixiang Luo, Tongda Xu, Yan Wang, Zhi Wang, Hongwei Qin

Most image compression algorithms only consider uncompressed original image, while ignoring a large number of already existing JPEG images.

Image Compression Quantization

Efficient Learned Lossless JPEG Recompression

no code implementations25 Aug 2023 Lina Guo, Yuanyuan Wang, Tongda Xu, Jixiang Luo, Dailan He, Zhenjun Ji, Shanshan Wang, Yang Wang, Hongwei Qin

Second, we propose pipeline parallel context model (PPCM) and compressed checkerboard context model (CCCM) for the effective conditional modeling and efficient decoding within luma and chroma components.

Image Compression Quantization

Conditional Perceptual Quality Preserving Image Compression

no code implementations16 Aug 2023 Tongda Xu, Qian Zhang, Yanghao Li, Dailan He, Zhe Wang, Yuanyuan Wang, Hongwei Qin, Yan Wang, Jingjing Liu, Ya-Qin Zhang

We propose conditional perceptual quality, an extension of the perceptual quality defined in \citet{blau2018perception}, by conditioning it on user defined information.

Image Compression

FlowFormer: A Transformer Architecture and Its Masked Cost Volume Autoencoding for Optical Flow

no code implementations8 Jun 2023 Zhaoyang Huang, Xiaoyu Shi, Chao Zhang, Qiang Wang, Yijin Li, Hongwei Qin, Jifeng Dai, Xiaogang Wang, Hongsheng Li

This paper introduces a novel transformer-based network architecture, FlowFormer, along with the Masked Cost Volume AutoEncoding (MCVA) for pretraining it to tackle the problem of optical flow estimation.

Optical Flow Estimation

VideoFlow: Exploiting Temporal Cues for Multi-frame Optical Flow Estimation

1 code implementation ICCV 2023 Xiaoyu Shi, Zhaoyang Huang, Weikang Bian, Dasong Li, Manyuan Zhang, Ka Chun Cheung, Simon See, Hongwei Qin, Jifeng Dai, Hongsheng Li

We first propose a TRi-frame Optical Flow (TROF) module that estimates bi-directional optical flows for the center frame in a three-frame manner.

Optical Flow Estimation

KBNet: Kernel Basis Network for Image Restoration

1 code implementation6 Mar 2023 Yi Zhang, Dasong Li, Xiaoyu Shi, Dailan He, Kangning Song, Xiaogang Wang, Hongwei Qin, Hongsheng Li

In this paper, we propose a kernel basis attention (KBA) module, which introduces learnable kernel bases to model representative image patterns for spatial information aggregation.

Color Image Denoising Deblurring +4

Spatial Moment Pooling Improves Neural Image Assessment

no code implementations29 Sep 2022 Tongda Xu, Yifan Shao, Yan Wang, Hongwei Qin

In recent years, there has been widespread attention drawn to convolutional neural network (CNN) based blind image quality assessment (IQA).

Blind Image Quality Assessment

Flexible Neural Image Compression via Code Editing

no code implementations19 Sep 2022 Chenjian Gao, Tongda Xu, Dailan He, Hongwei Qin, Yan Wang

Neural image compression (NIC) has outperformed traditional image codecs in rate-distortion (R-D) performance.

Image Compression Quantization

Efficient Burst Raw Denoising with Variance Stabilization and Multi-frequency Denoising Network

no code implementations10 May 2022 Dasong Li, Yi Zhang, Ka Lung Law, Xiaogang Wang, Hongwei Qin, Hongsheng Li

As for each sub-network, we propose an efficient multi-frequency denoising network to remove noise of different frequencies.

Denoising

FlowFormer: A Transformer Architecture for Optical Flow

1 code implementation30 Mar 2022 Zhaoyang Huang, Xiaoyu Shi, Chao Zhang, Qiang Wang, Ka Chun Cheung, Hongwei Qin, Jifeng Dai, Hongsheng Li

We introduce optical Flow transFormer, dubbed as FlowFormer, a transformer-based neural network architecture for learning optical flow.

Optical Flow Estimation

ELIC: Efficient Learned Image Compression with Unevenly Grouped Space-Channel Contextual Adaptive Coding

5 code implementations CVPR 2022 Dailan He, Ziming Yang, Weikun Peng, Rui Ma, Hongwei Qin, Yan Wang

Recently, learned image compression techniques have achieved remarkable performance, even surpassing the best manually designed lossy image coders.

Image Compression

Post-Training Quantization for Cross-Platform Learned Image Compression

no code implementations15 Feb 2022 Dailan He, Ziming Yang, Yuan Chen, Qi Zhang, Hongwei Qin, Yan Wang

It has been witnessed that learned image compression has outperformed conventional image coding techniques and tends to be practical in industrial applications.

Image Compression Quantization

IDR: Self-Supervised Image Denoising via Iterative Data Refinement

1 code implementation CVPR 2022 Yi Zhang, Dasong Li, Ka Lung Law, Xiaogang Wang, Hongwei Qin, Hongsheng Li

To evaluate raw image denoising performance in real-world applications, we build a high-quality raw image dataset SenseNoise-500 that contains 500 real-life scenes.

Image Denoising

Rethinking Noise Synthesis and Modeling in Raw Denoising

1 code implementation ICCV 2021 Yi Zhang, Hongwei Qin, Xiaogang Wang, Hongsheng Li

However, the real raw image noise is contributed by many noise sources and varies greatly among different sensors.

Image Denoising

Post-Training Quantization Is All You Need to Perform Cross-Platform Learned Image Compression

no code implementations29 Sep 2021 Dailan He, Ziming Yang, Yan Wang, Yuan Chen, Qi Zhang, Hongwei Qin

It has been witnessed that learned image compression has outperformed conventional image coding techniques and tends to be practical in industrial applications.

Image Compression Quantization

Checkerboard Context Model for Efficient Learned Image Compression

3 code implementations CVPR 2021 Dailan He, Yaoyan Zheng, Baocheng Sun, Yan Wang, Hongwei Qin

To the best of our knowledge, this is the first exploration on parallelization-friendly spatial context model for learned image compression.

Computational Efficiency Image Compression

Cross-dataset Training for Class Increasing Object Detection

1 code implementation14 Jan 2020 Yongqiang Yao, Yan Wang, Yu Guo, Jiaojiao Lin, Hongwei Qin, Junjie Yan

Given two or more already labeled datasets that target for different object classes, cross-dataset training aims to detect the union of the different classes, so that we do not have to label all the classes for all the datasets.

Object object-detection +1

Quantization Mimic: Towards Very Tiny CNN for Object Detection

no code implementations ECCV 2018 Yi Wei, Xinyu Pan, Hongwei Qin, Wanli Ouyang, Junjie Yan

To the best of our knowledge, our method, called Quantization Mimic, is the first one focusing on very tiny networks.

Object object-detection +2

Joint Training of Cascaded CNN for Face Detection

no code implementations CVPR 2016 Hongwei Qin, Junjie Yan, Xiu Li, Xiaolin Hu

Cascade has been widely used in face detection, where classifier with low computation cost can be firstly used to shrink most of the background while keeping the recall.

Face Detection Region Proposal

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