The Hewlett-Packard 6250C Flatbed Scanner
Specifications
There is an HP ScanJet 6250C Colour scanner
located in the Library. It has both USB and SCSI interfaces
(the USB port is used here). It has a Sheet Feeder and documents up to
216mm x 356mm can be placed on the scanning glass. (If you need to make
slides please contact Photography
as they have a scanner with a slide attachment.) The hardware resolution
is 1200 dots per inch which is enhanced by interpolation. The number of
colours is that provided by 36 bits ie. some 68 billion colours.
Scanning Pictures
To scan graphics, start up Adobe Photoshop
or your favouritre TWAIN-compatible paint program.
From the file menu select:
File -> Import -> TWAIN_32
This will start the HP PrecisionScan Pro
scanning module
On the Scan menu, you can do a preview
scan, which is also done automatically when the scanning module is started.
To adjust scanning parameters, use the Tools menu. To do a real scan and
put the image into Adobe Photoshop, first draw a box around the page area
you want scanned, and then select Place Image from the Scan menu.
Scanning Documents
Start up PageKeeper Standard. This is a document
management program which has built in scanning capability. When a document
is scanned, it is saved as both graphics and as text i.e. Optical Character
Recognition (OCR) is performed on any recognisable text in the document.
To start scanning, from the File menu select:
File -> New -> Document from Scanner
To view the document as either text or
graphics, select the scanned document whose thumbnail view is shown. Then
click on one of the large buttons representing the program needed to open
it. In the case of OCR text, select WordPad or Word. Text documents which
have been scanned in will need to be proof read.
Quick Scan
Pressing the button on the front of the scanner
will start HP PrecisionScan Pro.
Power Saving
The whole system is Energy Star compatible
and will go into low power mode after a number of minutes. Therefore the
system can be left on and it will wake up when the mouse is moved. The
scanner goes into low power mode after 10 minutes of inactivity. When a
scan is requested, it will wake up which involves warming up the scanning
lamp.
Document Storage
The computer has a large hard disk and documents
can be placed temporarily in 'My Documents'. It is faster to work on files
here than to use a floppy disk or network drive. However, there is no guarantee
that files stored on the hard disk will be kept and they are not backed
up. Needed files should be transferred via the network to a mapped drive
or via ftp, or put onto a Zip Disk.
Size of Files
Graphics files can be very large. It is tempting
to scan using the highest possible resolution and number of colours, but
the file will be unmanageable. It may be very difficult to find space to
store it, and importing it into a word processor may be impossible due
to memory constraints. Only use the resolution you need. Use a compressed
file format such as .jpg if close up detail is not important. Save only
the text part of an OCR'd image. Scan only the part of an image that you
are interested in. Don't save a black and white line image using 16,000,000
colours. Adjustment of image parameters can be done before the scan and
adjustment can be made within Adobe Photoshop or other graphics program.
More information
A comprehensive guide to scanning is available
at www.scantips.com.
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It was last modified on: Monday 02-Jun-2003
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