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Scanning Systems

IP.com Disclosure Number: IPCOM000029547D
Publication Date: 2004-Jul-06
Document File: 1 page(s) / 26K

Publishing Venue

The IP.com Prior Art Database

Abstract

Scanning Systems: A technique for transferring image data between scanner and workstation where there is insufficient bandwidth available on the link using jpeg2000 compression formats.

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Scanning Systems : A technique for transferring image data between scanner and workstation where there is insufficient bandwidth available on the link using jpeg2000 compression formats.

There are many still image scanning systems in use throughout the world that capture images using a one or two dimensional array of light sensitive elements. In many of these scanners the light sensitive array used is a Charge Coupled Device or CCD. As CCD technology is improving with the passage of time the speed at which the light sensitive information is converted to digital data is increasing. This data forms a continuous data stream, which commonly needs to be stored within some form of storage device. To avoid having large storage devices closely coupled to the CCD, it is common practice to transmit the digital data stream over a link (such as wired serial links like USB or FireWire or wireless links such as 802.11g) to a workstation such as a Personal Computer where the image is then stored.

There is a point where the increasing data bandwidth requirement exceeds the bandwidth available on these standard scanner/workstation links. Two approaches could be taken here; either a proprietary high speed interface is developed which can sustain the higher bandwidth requirement or some attempt is made to reduce the amount of data that needs to be transferred in a given time.

One technique for reducing the bandwidth requirement is to use some form of data compression on the image data. In the case of static or stationar...