{"action":"created","issue":{"url":"https://api.github.com/repos/imagej/imagej/issues/117","repository_url":"https://api.github.com/repos/imagej/imagej","labels_url":"https://api.github.com/repos/imagej/imagej/issues/117/labels{/name}","comments_url":"https://api.github.com/repos/imagej/imagej/issues/117/comments","events_url":"https://api.github.com/repos/imagej/imagej/issues/117/events","html_url":"https://github.com/imagej/imagej/issues/117","id":64102692,"number":117,"title":"Improve ImageJ's handling of large (>4GB) TIFF files","user":{"login":"ctrueden","id":556626,"avatar_url":"https://avatars.githubusercontent.com/u/556626?v=3","gravatar_id":"","url":"https://api.github.com/users/ctrueden","html_url":"https://github.com/ctrueden","followers_url":"https://api.github.com/users/ctrueden/followers","following_url":"https://api.github.com/users/ctrueden/following{/other_user}","gists_url":"https://api.github.com/users/ctrueden/gists{/gist_id}","starred_url":"https://api.github.com/users/ctrueden/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ctrueden/subscriptions","organizations_url":"https://api.github.com/users/ctrueden/orgs","repos_url":"https://api.github.com/users/ctrueden/repos","events_url":"https://api.github.com/users/ctrueden/events{/privacy}","received_events_url":"https://api.github.com/users/ctrueden/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":9,"created_at":"2015-03-24T21:22:36Z","updated_at":"2016-02-19T09:06:17Z","closed_at":null,"body":"It should be possible to quickly load, browse and save very large TIFF files in a coherent way. There are several pieces to this:\r\n\r\n* [ ] Ensure SCIFIO transparently writes to BigTIFF when exporting using File > Export > Image...\r\n* [ ] Make SCIFIO able to import ImageJ1's \"raw pseudo TIFF\" format\r\n* [ ] Make SCIFIO's \"virtual stack\" (cell image) performance as good as possible\r\n* [ ] Make SCIFIO recognize signs (e.g., an ImageJ1-style ImageDescription in the first IFD) when a TIFF is written monotonically, so it can be parsed more quickly (i.e., without explicitly reading all the IFDs)\r\n* [ ] Make SCIFIO add such signs (probably some new metadata as a directory entry in the first IFD) when writing TIFFs\r\n\r\nAlso critical is to improve performance of Bio-Formats `setId` calls of various high-impact proprietary file formats such as ND2, although that work is outside the scope of this issue.\r\n\r\nSee also these mailing list threads:\r\n* [Problems with Saving Tiff greater than 4 GB & bigTiff exporter](http://imagej.1557.x6.nabble.com/Problems-with-Saving-Tiff-greater-than-4-GB-bigTiff-exporter-tp5010074.html)\r\n* [Processing huge files](http://imagej.1557.x6.nabble.com/Processing-huge-files-tp5012001.html)\r\n* [bfconverter nd2 to tif](http://imagej.1557.x6.nabble.com/bfconverter-nd2-to-tif-tp5012133.html)"},"comment":{"url":"https://api.github.com/repos/imagej/imagej/issues/comments/186123520","html_url":"https://github.com/imagej/imagej/issues/117#issuecomment-186123520","issue_url":"https://api.github.com/repos/imagej/imagej/issues/117","id":186123520,"user":{"login":"uxhub","id":17022961,"avatar_url":"https://avatars.githubusercontent.com/u/17022961?v=3","gravatar_id":"","url":"https://api.github.com/users/uxhub","html_url":"https://github.com/uxhub","followers_url":"https://api.github.com/users/uxhub/followers","following_url":"https://api.github.com/users/uxhub/following{/other_user}","gists_url":"https://api.github.com/users/uxhub/gists{/gist_id}","starred_url":"https://api.github.com/users/uxhub/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/uxhub/subscriptions","organizations_url":"https://api.github.com/users/uxhub/orgs","repos_url":"https://api.github.com/users/uxhub/repos","events_url":"https://api.github.com/users/uxhub/events{/privacy}","received_events_url":"https://api.github.com/users/uxhub/received_events","type":"User","site_admin":false},"created_at":"2016-02-19T09:06:17Z","updated_at":"2016-02-19T09:06:17Z","body":"OK thank you for your replies. \r\nI will have a look on ICS format, but it doesn't seem to be standard in a lot of API and software. (I'll probably use the raw format...).\r\nCould libtiff and bigtiff be used in IJ to save properly large tiff files ? \r\nRegards,\r\n"}}