rjt Posted August 29, 2008 Share Posted August 29, 2008 Opening a 100 page mulitpage TIFF file and then saving it deletes 99 pages without any warning. Our scanning employees lost a great deal of work today trying out a great new program. Please look at the following website http://www.mikekohn.net/file_formats/tiff.php which explains the compression involved in CCITT Group 4 Fax. The TIFF format is the standard in document imaging and document management systems using CCITT Group IV 2D compression, which supports black-and-white (bitonal, monochrome) images. In high-volume storage scanning, documents are scanned in black and white (not in colour or in grayscale) to conserve storage capacity. An average A4 scanning produces 30 KB of data at 200 ppi (pixels per inch of resolution) and 50 KB of data at 300 ppi; 300 ppi is more common than 200 ppi. The TIFF format can save multi-page documents to a single TIFF file rather than a series of files for each scanned page. Multi-page support and 2D compression of bitonal images led to the TIFF's becoming the standard storage format facsimiles, especially on Fax Servers. Quote Link to comment Share on other sites More sharing options...
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