Tom,
I agree that 360 dpi might give better results on a high quality
printer, however the image being 313, 324, 367, 425 or 375 dpi original
isn't of any importance. The hardware or software RIP wil translate the
digital dpi's in analog ink drops, whatever dpi as input. It is a thing
of apples and oranges.
As I said before: the red green and blue of the digital image has to be
translated to the CMYK of the printer, where the printer has an
irregular dot pattern, and the digital file a regular square pattern.
It is not possible to interrelate the two dpi's! The only fact is that
you can't print what isn't there at first, so an image of say 8x10 at
360 dpi will give better results than the same downsampled to 300 dpi
on a printer with the possibility to resolve enough detail.
So that it needs to be an even divisor is a myth, it simply can't be,
because the printer doesn't print square dots (unless you have a dot
matrix, :-) and the dots are all of a different color, they are not
composed of 3 components like the digital RGB.
Iwert.
Op 6-mei-06 om 20:02 heeft Tom Scales het volgende geschreven:
>
> My point wasn't that the image needs to be 720 or 1440, but that it
> needs to
> be an even divisor of the printers capabilities. 360 is superior to
> 300 --
> on an Epson.
>
> Tom
> ----- Original Message -----
> From: "iwert" <zuiko@xxxxxxxxxx>
> To: <olympus@xxxxxxxxxx>
> Sent: Saturday, May 06, 2006 5:57 AM
> Subject: [OM] Re: in-camera image resolution
>>
>> Interesting mythology!
>>
>> the resolution of a printer has nothing to do with the resolution
>> required to print. Art books are printed at a max resolution of 450
>> dpi, 300 dpi is perfectly suitable for good printing. 720 dpi is over
>> the top, and 1440 is downright "stupid". It only extends printing
>> times, rip times and consumes much processing power.
>>
>> write it somewhere clear:
>>
>> 300 dpi is the perfect printing resolution for high quality!
>>
>> just had to get this of my chest, my wife is in printing business and
>> I
>> learned it the hard way!
>>
>> One possible effect of images in a too high resolution (say 1440 dpi)
>> is that they come out much darker than wanted, mostly it is just time
>> consuming.
>>
>> Iwert.
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