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From: Peter D on 11 Jan 2008 10:36
Does anyone know what "Hardware Scanning Resolution" means in the HP Scanner
descriptions? For example, the G4050 is "4800 x 4800" and "9600 x 4800
Hardware Scanning Resolution".
I've searched the 'Net and can't find anything other than repeats of the
phrase. It's not "interpolated" or "enhanced" resolution. Both are mentioned
in the same articles as something different.


From: CSM1 on 11 Jan 2008 11:58
"Peter D" <please@.sk> wrote in message
news:13of38jgcj5viab(a)corp.supernews.com...
> Does anyone know what "Hardware Scanning Resolution" means in the HP
> Scanner descriptions? For example, the G4050 is "4800 x 4800" and "9600 x
> 4800 Hardware Scanning Resolution".
> I've searched the 'Net and can't find anything other than repeats of the
> phrase. It's not "interpolated" or "enhanced" resolution. Both are
> mentioned in the same articles as something different.
>
>

It means real resolution.

Scanning resolution is defined in Pixels Per Inch also known as Dots Per
Inch. PPI or DPI.

The more PPI or DPI you have the more definition your image will have and
also the larger the file size will be.

For more information about scanning in general and scanning in detail.
http://www.scantips.com/

--
CSM1
http://www.carlmcmillan.com
--


From: Robert Jasiek on 11 Jan 2008 13:48
On Fri, 11 Jan 2008 09:36:49 -0600, "Peter D" <please@.sk> wrote:
>Does anyone know what "Hardware Scanning Resolution" means in the HP Scanner
>descriptions? For example, the G4050 is "4800 x 4800" and "9600 x 4800
>Hardware Scanning Resolution".

It is the optical resolution of the scanner. Forget about the bigger
value but take the 4800.

However, essentially all manufacturers cheat dramatically. Test
magazines reveal true resolutions of about 850 x 1150 when it says
4800. The even greater problem is that each manufacturer lies
differently; you cannot compare any two official values; you can only
compare test values in the same test report.

Forget about "interpolated resolution". You can get that also by
blurring a picture in a graphics software. The only purpose of such
figures is to deceive uninformed customers.

Resolution is important mostly for scanning negatives because small
samples shall be increased dramatically later. In case of prints it
suffices to notice when a resolution is unusually small compared to
other typical products.
From: Neil Gould on 14 Jan 2008 07:32
Recently, Peter D <please@.sk> posted:

> Does anyone know what "Hardware Scanning Resolution" means in the HP
> Scanner descriptions? For example, the G4050 is "4800 x 4800" and
> "9600 x 4800 Hardware Scanning Resolution".
> I've searched the 'Net and can't find anything other than repeats of
> the phrase. It's not "interpolated" or "enhanced" resolution. Both
> are mentioned in the same articles as something different.
>
"Hardware Scanning Resolution" refers to the number of sensor sites on the
scanner's sensor and the amount of movement that the sensor driving motor
provides. For example, a sensor could be 4800 sites across, so that would
equate to the actual hardware resolution in one dimension. To scan a page,
it moves the sensor (going in one direction to keep this simple). If the
motor moves the sensor in a 1:1 relationship -- i.e. it moves the sensor
the same distance as the width of a sensor site -- then you'd have a
"Hardware Scanning Resolution" of 4800 x 4800. If it moves the sensor 1/2
the width of the sensor site, then software intepolates the two samples
into a single pixel that is considered "enhanced" resolution.

Hope this helps.

Neil


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