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July 2007
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2007.07.03 14:34 "Re: Big TIFF Compression", by Kemp Watson
Andy: >>I'm interested in hearing real examples as to why BigTIFF is useful for >>georeferencing and medical imaging. Are the images really that big? After >>compression or only without? Are they big 'cause they are multi-channel, >>or >>multi-page, or uncompressed, or, ...? Yes, some images are that big. Our medical images for virtual microscopy are anywhere from 50,000 pixels on a side, up to 900,000 pixels on a side, for current file sizes up to around 770,000 megapixels, or 2.2 TB raw. That's 3-component RGB, 8-bit - we're moving to support 32-component, 16-bit, with ~16 layers, which will make the larger images over a petabyte each, uncompressed. Take a peek at our website, below, for a few samples if you like. W. Kemp Watson, CEO Objective Pathology Services Ltd Toronto, Ontario (905) 770-7802 http://www.objectivepathology.ca No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.9.14/885 - Release Date: 03-Jul-2007 10:02 AM