Re: printing an op-scan sheet...

[Don <dr2@xxxxxxxxxxxxxxxx>]

I'ld considered the overprint option...seemed like the best way to fill in
the blanks and yet not use a special character that might not xlat the
same accross the net...

I appreciate the ideas extended and now off to experiment...:)

Don in DC metro

On Sat, 21 Mar 1998, James W. Kilgore wrote:

> 
> 
> Gary L Peskin wrote:
> 
> > We always used to used a dollar sign ($).  It used to cover the oval
> > well and we had no problems scanning.
> >
> 
> You're right. The name of the game is to black out enough area to get a 
>positive
> read.  The difference is in the sensitivity of the reader. This may require a 
>change
> in the reader.  Turn xx% grey to black.
> 
> We used two prints. We printed a upper case O (oh) with zero skip then 
>printed a
> "#".
> 
> This gave us the right number of black/white pixel resolution to obtain a 
>read.
> 
> An upper case oh or zero overstrike by a "X" or "@"  or "&" or "%" might also 
>work.
> 
> Although we could create special printer pin patterns, that required printer
> specific code.  Not a good thing IMO.
> 
>  Without overstrike we got too many failed reads.  Don't know why, some 
>readers do
> averaging on center, some over the whole image.  Sort of like auto adjusting 
>cameras
> I guess.  Put a person in front of a window with background light coming 
>through and
> all you get is a shadow for overall averageing, but a center focus would cut 
>down on
> the background light and adjust for the center of focus.  (Best analogy I 
>could come
> up with at this late hour :-))
> 
>  We also had to replace ribbons more often to get a good deep black image 
>that the
> reader would pick up.  We've had similar problems with bar code scanners and 
>learned
> that 9 pin actually worked better than 24 pin print. Bigger and bolder.
> 
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