{"id":20909395,"url":"https://github.com/lingyzhu0101/bit_depth_expansion","last_synced_at":"2026-03-15T16:52:17.570Z","repository":{"id":262774973,"uuid":"888304826","full_name":"lingyzhu0101/Bit_Depth_Expansion","owner":"lingyzhu0101","description":"[MMSP'24] Diffusion-based Bit-depth Expansion","archived":false,"fork":false,"pushed_at":"2024-11-15T03:14:11.000Z","size":6384,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"lingyzhu0101","last_synced_at":"2025-12-29T18:17:08.421Z","etag":null,"topics":["computer-vision","deep-learning","diffusion-models","generative-model"],"latest_commit_sha":null,"homepage":"","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/lingyzhu0101.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2024-11-14T07:02:29.000Z","updated_at":"2024-11-16T16:52:33.000Z","dependencies_parsed_at":"2025-12-27T21:04:10.095Z","dependency_job_id":null,"html_url":"https://github.com/lingyzhu0101/Bit_Depth_Expansion","commit_stats":null,"previous_names":["lingyzhu0101/bit_depth_expansion"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/lingyzhu0101/Bit_Depth_Expansion","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lingyzhu0101%2FBit_Depth_Expansion","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lingyzhu0101%2FBit_Depth_Expansion/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lingyzhu0101%2FBit_Depth_Expansion/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lingyzhu0101%2FBit_Depth_Expansion/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/lingyzhu0101","download_url":"https://codeload.github.com/lingyzhu0101/Bit_Depth_Expansion/tar.gz/refs/heads/lingyzhu0101","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lingyzhu0101%2FBit_Depth_Expansion/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":30547113,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-03-15T15:03:43.933Z","status":"ssl_error","status_checked_at":"2026-03-15T15:03:37.630Z","response_time":61,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["computer-vision","deep-learning","diffusion-models","generative-model"],"created_at":"2024-11-18T14:10:50.167Z","updated_at":"2026-03-15T16:52:17.548Z","avatar_url":"https://github.com/lingyzhu0101.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# [MMSP'24] Bit_Depth_Expansion (Diffusion)\nOfficial Pytorch implementation of **Diffusion-based Bit-depth Expansion**.\n\n[Riyu Lu](),\n[Lingyu Zhu](https://scholar.google.com/citations?user=IhyTEDkAAAAJ\u0026hl=zh-CN),\n[Baoliang Chen](https://scholar.google.com/citations?user=w_WL27oAAAAJ\u0026hl=zh-CN),\n[Xiaopeng Fan](https://scholar.google.com/citations?user=4LsZhDgAAAAJ\u0026hl=zh-CN),\n[Shiqi Wang](https://scholar.google.com/citations?user=Pr7s2VUAAAAJ\u0026hl=zh-CN)\n\n\n[[`PDF`](https://ieeexplore.ieee.org/document/10743597)] [[`Poster`]()] [[`Presentation`](src/figures/Presentation.pdf)]\n\n## Overview\n\u003cp align=\"left\"\u003e\n\u003cimg src=\"src/figures/framework.png\" width=80% height=80% \nclass=\"center\"\u003e\n\u003c/p\u003e\n\nDiffusion-based generative models have achieved remarkable success across a variety of applications. However, the potential application for bit-depth expansion has not been extensively studied. This paper introduces a wavelet-based diffusion model for the bit-depth expansion task. In this method, the image is first decomposed into low and high-frequency components via wavelet transformation. This decomposition allows for targeted processing by specialized modules and reduces computational complexity by lowering the image resolution. The low-frequency component is processed in both the forward diffusion and reverse denoising stages. Meanwhile, the high-frequency components are\nfiltered by the High Frequency Denoising Filter (HFDF) to eliminate noise and artifacts. Finally, the low and high-frequency components are recombined into a predicted high-bit-depth image through inverse wavelet transformation. Experimental results demonstrate the superiority of the proposed method in producing perceptually compelling outputs that outperform previous methods.\n\n## Qualitative Performance\n\u003cp align=\"left\"\u003e\n\u003cimg src=\"src/figures/Qualitative result.png\" width=80% height=80% \nclass=\"center\"\u003e\n\u003c/p\u003e\n\n\n## TODO List\nThis repository is still under active construction:\n- [ ] Release training and testing codes\n- [ ] Release pretrained models\n- [ ] Clean the code\n\n\n## Contact\n\n- Lingyu Zhu: lingyzhu-c@my.cityu.edu.hk\n- Riyu Lu: riyulu2-c@my.cityu.edu.hk\n\n## Citation\n\nIf you find our work helpful, please consider citing:\n\n```bibtex\n@INPROCEEDINGS{10743597,\n  author={Lu, Riyu and Zhu, Lingyu and Chen, Baoliang and Fan, Xiaopeng and Wang, Shiqi},\n  booktitle={2024 IEEE 26th International Workshop on Multimedia Signal Processing (MMSP)}, \n  title={Diffusion-Based Bit-Depth Expansion}, \n  year={2024}}\n\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flingyzhu0101%2Fbit_depth_expansion","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flingyzhu0101%2Fbit_depth_expansion","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flingyzhu0101%2Fbit_depth_expansion/lists"}