[softwarelist] Re: Halftone scanning

In a recent message           David Pilling 
<flist@xxxxxxxxxxxxxxxxxxx> wrote:

> In message <aa667c484f.Dave@xxxxxxxxxxxxxxxxxxxxxxxx>, Dave Barnett
> <dave@xxxxxxxxxxxxxxxxx> writes
>>As far as I was concerned DplngScan and TWAIN were joined at the hip.
> 
> No you can use both of them without the other.

I have used DpScan stand-alone to tweak images from a number of 
sources, very useful.  My version of !TWAIN does not load to the 
iconbar, so I don't know its version or stand-alone capability.
> 
[...]
> 
>>The best result is obtained using 100dpi Grey with Superscale, dither
>>makes no difference.   This is very acceptable.  Mottling is no longer
>>apparent (as scanned).
> 
> Dan made a good point. Moire patterning can also be due to the monitor
> screen - the magnify tool in DPscan has a button "rational" which gets
> rid of such effects by displaying one image pixel per screen pixel.
> 
That has no effect.  Increasing dpi above 100 increases problem.  I am 
happy with results for this image.

OT ?   One thing that I have found for DPscan is that increasing the 
'Next' bar on the Task display reduces the incidence of 'Type 5' 
errors.


-- 
Dave
Keep GMT all year

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