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February 2009
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2009.02.23 02:01 "Re: losslessly wrap jpeg file into TIFF", by Zhang Weiwu
Joris Van Damme (AWare Systems) 写道: > Zhang, > >> hello. is there a way to use user tool (e.g. tiffcp) to enclose jpeg >> file into tiff losslessly? It should be in theory possible because TIFF >> can have jpeg as sub-format, but all solution i know of,e.g. using >> convert(1), recompress the image during convention and reduce its >> quality. > > It's not completely this straightforward. > Hi. I can see the implementation difficulty here. However I still suggest to the developers that somebody would be brave and take this job, because it has practical use case. Users working in companies dealing with a lot of documents find it easier to manage documents if using TIFF to join pages of text that was part of a same original document into single TIFF instead of a zip archive of hundreds of images. The ease-of-management comes because of ease faxing the document as a whole, ease of doing process to all pages (e.g. cut the margin), and being sure the pages are always in the right order despite user's preference of sorting files in directories. However chances are they received the documents as a lot of jpeg file in the first place. And they naturally want to enclose them into TIFF or PDF without losing quality. _______________________________________________ Tiff mailing list: Tiff@lists.maptools.org http://lists.maptools.org/mailman/listinfo/tiff http://www.remotesensing.org/libtiff/