{"id":19512320,"url":"https://github.com/vmchale/perceptual-hash","last_synced_at":"2026-03-02T08:01:03.021Z","repository":{"id":39609150,"uuid":"196877923","full_name":"vmchale/perceptual-hash","owner":"vmchale","description":"Perceptual Hash in J","archived":false,"fork":false,"pushed_at":"2020-10-05T23:07:09.000Z","size":1025,"stargazers_count":9,"open_issues_count":1,"forks_count":1,"subscribers_count":6,"default_branch":"master","last_synced_at":"2025-02-25T23:17:06.208Z","etag":null,"topics":["j","perceptual-hash","perceptual-hashing","phash"],"latest_commit_sha":null,"homepage":null,"language":"J","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-3-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/vmchale.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2019-07-14T19:58:56.000Z","updated_at":"2024-12-30T04:02:25.000Z","dependencies_parsed_at":"2022-09-10T20:22:49.884Z","dependency_job_id":null,"html_url":"https://github.com/vmchale/perceptual-hash","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/vmchale/perceptual-hash","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Fperceptual-hash","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Fperceptual-hash/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Fperceptual-hash/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Fperceptual-hash/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/vmchale","download_url":"https://codeload.github.com/vmchale/perceptual-hash/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Fperceptual-hash/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":29995910,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-03-02T01:47:34.672Z","status":"online","status_checked_at":"2026-03-02T02:00:07.342Z","response_time":60,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"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":["j","perceptual-hash","perceptual-hashing","phash"],"created_at":"2024-11-10T23:25:28.753Z","updated_at":"2026-03-02T08:01:03.000Z","avatar_url":"https://github.com/vmchale.png","language":"J","funding_links":[],"categories":[],"sub_categories":[],"readme":"# perceptual-hash\n\nA DCT-based perceptual hash in J.\n\nSee [here](https://www.phash.org/docs/pubs/thesis_zauner.pdf) for background.\n\n## Use\n\n```j\nload 'phash.ijs'\nphash (read_image 'demo-data/frog.jpeg')\n0 0 1 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1 1 0 0 0 0 0 1 1 1 0 1 0 0 1 0 1 0 0 0\nphash (read_image 'demo-data/frog.png')\n0 0 1 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1 1 0 0 0 0 0 1 1 1 0 1 0 0 1 0 1 0 0 0\nphash (read_image 'demo-data/cat.png')\n0 0 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 0 0 0 1 1 1 1 1 0 0 1 0 0 1 1 1 1 0 0 1 1 0 1 1 0 0 0 0 1 1 1 1 0 0 1\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvmchale%2Fperceptual-hash","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fvmchale%2Fperceptual-hash","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvmchale%2Fperceptual-hash/lists"}