Digital BW, The Print

On 05/20/2011 06:56 PM, Mel wrote:
> Has anyone any experience of BenVista PhotoZoom 4 ?
>
> I downloaded the trial version yeterday and started to test it out.
>
> The Help menu says the following:-
>
> "When resizing an image for printing purposes, it is of great importance to make sure that the print size you specify in PhotoZoom Pro 4 corresponds with your printer settings. For example, When you specify a print size of 11 by 8 inch at 300 DPI in PhotoZoom Pro 4, but set your printer to print at 11 by 8 inch at 2400 DPI, this will most probably cause a lot of quality loss".
>
> I asked BenVista to explain this and this was their answer.
>
> "For optimum quality, it is best to set the resolution to 1440 DPI in PhotoZoom Pro 4 if you print at 1440 DPI.
>
> However, please note that we are planning to revise the quoted passage of the help file. The quality differences are actually very marginal, when you print a 300 DPI (rather than a 1440 DPI) image at 1440 DPI. The differences are however *much* greater when you print a 72 DPI (rather than a 300 DPI) image at 300 DPI.
>
> We are going to revise the mentioned numbers, so the example in the help file will make more sense. Our apologies for the caused confusion!"
>
> If I set the resolution to 1440 in PhotoZoom I get a massive 1Gb file.
> You wouldn't need to set the resolution beyond 360 dpi for printing, surely, to obtain a good print.
>
> Can someone else explain this as I feel I must be missing something.
>
> Incidentally I use QTR and Epson 1290 for printing and set the resolution to 1440 super.
>
> Mel

The right approach is to get the printer driver's feedback on what it 
finds optimal in PPI as the image input resolution for the print 
settings used (print resolution in DPI, weaving strokes, uni- or 
bidirectional etc.). Some drivers show that input resolution number in 
PPI (native printer resolution) (HP Z models do), some applications like 
Qimage gather that information from an API call the driver makes and 
show it to the user + do the extrapolation and sharpening automatically 
and intelligent to that input resolution. In practice that number is 360 
or 720 PPI for Epsons and 300 or 600 PPI for HPs and Canons. There are 
some higher numbers possible with some printer settings but their use is 
more for text and vector designs to be printed.


-- 
Met vriendelijke groeten,   Ernst

Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/

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