"Utilisateur PC Libre Service" <postinnew@[EMAIL PROTECTED]
> wrote in message
news:<ch94iv$u21$1@[EMAIL PROTECTED]
>...
> Hi,
>
> Reading the specification of graphics tablets, I've found that they
give
> resolution (in dpi) and precision.
>
> For a graphire, resolution is 1000 dpi (wich woulds mean 5000*4000
> different position one the tablettes), but precision is 0,5mm (wich
would
> mean 256*205 position !!)
>
> Can you give me the meaning of this parameter for a pen tablet ? (I
> understand what DPI are for a scanner, printer, screen, but here the
fact
> that they give DPI + precision confuse me)
Assuming Wacom's specs are the same for basically everything else, the
difference between accuracy and resolution is straightfoward.
Resolution means they've that many distinguishable positions while
precision
has to do with accuracy.
Let's say that the resolution "increments" were put on the tablet as a
line of little dots. They represent the resolution of the screen. However
the placement of those dots across the screen may not be exactly evenly
spaced, there may be distortions in terms of how even the spacings are.
May be spaced a little wider on the left side of the tablet than the
right side. It just adds up to 5000 dots no matter how they're spaced.
So if the tablet told your computer that the stylus is dead-center, it's
not
within 1/5000-th of the center, it's within 0.5mm of the center. The
"difference" has to do with how evenly spaced the dots are (or aren't).
Mike
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