|Cartesian Perceptual Compression (CPC) is emerging as an alternative to CCITT Group 4 compression as it provides higher compression ratios for storing 1-bit TIFF images for faster downloads and smaller storage requirements.|
|Research Libraries Group DigiNews|
|The reduction in document size provided by CPC compression permits us to offer the highest level of service to our clients, and the system of visualization is perfect.|
|Rubén Sánchez Peña, DIVULNET s.l.|
|This dramatic reduction in file size could enable an entirely new breed of imaging applications, due to the commensurate reductions in transmission costs, download times, and publication costs.|
|Ira Fuchs, Chief Scientist of JSTOR, Inc.|
The Cartesian Perceptual Compression (CPC) format was developed in the early 1990's in response to bandwidth limitations that were preventing the introduction of network-based electronic libraries. By using adaptive perceptual filters based on the dynamics of the human visual system, the CPC algorithm is able to reduce images to as much as 1/30th the size of the corresponding TIFF files -- with no loss in image fidelity. In fact, in blind tests of subjective image quality run by the International Organization for Standardization (ISO), subjects actually preferred CPC compressed images over the original images.
CPC Tool and the CPC format are currently in use in a variety of products and services, encompassing a broad range of applications including Internet fax services, document distribution, educational assistance, and electronic libraries. For example:
Government of Québec: The Québec government has digitized over 170 million pages comprising land registration documents dating back to the mid-19th century. A key concern of the project was congestion on their server networks. They choose the CPC format, resulting in dramatic reductions in server traffic, due to the smaller file size afforded by CPC compression.
Kurzweil Educational Systems: Providers of systems to aid in reading by the learning- and vision-disabled, allowing end users to scan in text documents which are then displayed on the screen and simultaneously read out loud (by the computer). To reduce storage requirements, the CPC format is used to store the scanned images.
EasyLink Global Fax Network: An international fax network which uses CPC compression for the internal transmission of faxes. Incoming faxes are compressed into CPC for routing through the network. On arrival at the destination, the fax is decompressed for transmission over local telephone lines.
iSqFt.com: Providers of online access to large format architectural specifications and plans for pending construction projects. iSqFt.com uses CPC format for the storage and transmission of these large format images, dramatically reducing download times and distribution costs.
IE Discovery: Providers of infodox.com, a web-based document repository utilizing CPC compression for image storage and transmission. "By using imaging technology that was built specifically for the Internet, rather than adapted to it, we were able to both improve the quality of the image and the time it takes to deliver it over the Internet by an order of magnitude over legacy compression methods like Tiff Group IV. "
LG Sangnam Library: The foremost library in Korea, the LG Sangnam Library has converted its entire digital catalog (over 6.7 million pages) to CPC format. The use of CPC compression reduced the size of their digital holdings from over 250 Gigabytes (in TIFF group IV format) to just 68 Gigabytes-- a savings of 182 Gigabytes. The library is continuing to acquire CPC images at a rate of over 2.2 million pages per year.
NTA, Inc.: NTA, Inc. is a third party engineering design review and quality inspection agency. "The CPC technology has allowed us to give our clients a competitive advantage by reducing their costs and turn around time."
Securities & Futures Institute: Established by the Taiwan Stock Exchange, the Securities & Futures Institute utilizes CPC technology to provide Internet access to images of Taiwanese corporate filings.
FIS|online: Publisher of Moody's Business and Financial Information has introduced FIS Annuals/U.S. - a new online report service utilizing CPC compression for document storage and CPC Lite for document delivery. The service provides online access to the most recent annual reports of all U.S. public corporations as well as thousands of historical annual reports. By deploying CPC technology, FIS|online is able to reduce storage costs, reduce network costs, eliminate viewer costs, and reduce download times.
idtplans.com: A web site for real estate development and construction professionals, providing real-time review and distribution of engineering and design plans in the hyper-compressed CPC format. "CPC technology has allowed our customers to view construction project plans in a whole new way. They can review and redline construction documents simultaneously online, allowing for better communication and coordination in all aspects of the construction cycle."
JSTOR: A digital library for academic journals funded by the Mellon Foundation. JSTOR uses CPC to store the digitized journal images. JSTOR has compressed over 2 million images into the CPC format and expects their eventual holdings to top 70 million pages. By converting to CPC compression, JSTOR's storage requirements dropped by over 77 percent.
|the best tiff viewer I've found is the Cartesian CPC Viewer... well worth the price.|
|Jillayne Schlicke, First American Title|
|I have been evaluating CPC View for my company's online service and we are quite impressed by the depth and breadth of functionality that you've incorporated.|
|Rob Tran, Virtual Expat|
Cartesian's popular CPC View imaging software provides efficient, intuitive, and powerful imaging capabilities for tens of thousands of users worldwide. With its unrivaled combination of quality, features, and cost, CPC View is the smart solution for corporate imaging needs around the world. Our corporate clients are drawn from a diverse spectrum of business and industrial interests including many of the world's largest companies. A small selection of our hundreds of corporate licensees:
CPC View is also used by a variety of United States government agencies including the Secretary of Defense, the Army Research Institute, the FBI, the Navy, and numerous federal courts around the country.
CPC View was awarded the prestigious
Five Star Editors' Pick
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