[Leica] Is this how pixels and dpi work?

[Jayanand Govindaraj]

Well, I just printed a 6 MP image from the Nikon D70 at A2 size for a
recent Print Exchange, and unless you knew about it, there is no way you
could have spotted it.

Cheers
Jayanand

On Wed, May 11, 2016 at 11:11 AM, Frank Filippone <red735i at verizon.net>
wrote:

> Some of the "magic" is the printer drivers... which have gotten much better
> in the last few years.....  They up-scale for the ink jets (spitters),
> which
> have resolutions of much more than 360DPI....
>
> I had a friend that was totally focused on these issues.... and the word
> constipated comes to mind....
>
> You are best off taking the image, then print it out using your chosen
> SW...
> the computer programs will figure it all out for you...
>
> I think I heard that a 4MP ( four, not forty) camera can print up to 8x10
> images with "popular" image acceptability....or maybe it was 5x7... in any
> event.
>
> Go make images....
>
> Frank Filippone
> Red735i at verizon.net
> Subject: Re: [Leica] Is this how pixels and dpi work?
>
> Image sensor to pixels, and pixels to printer dots, involve many image
> conversion technologies that affect image qualities along every step of the
> processing chain. You can't just map it one-to-one like you did.
>
>
> On Tue, May 10, 2016 at 12:26 PM, Lew Schwartz <lew1716 at gmail.com> wrote:
>
> > My understanding:
> > A 40mp sensor (for example) produces information for 10mp points of
> > capture due to the fact that the Bayer filter takes groups of 4 input
> > sites (GRGB) to produce a single point of capture record.
> >
> > If we have a full frame sensor, that would produce (@2:3) a capture of
> > aprox. 2582p x 3873p
> >
> > Assuming
> > 1.  that the printer & software editors output 1 capture datum to 1
> > dot of print (&I understand that this is not necessarily the case)
> >  -and-
> > 2. that we output to the printer at 360 dots/in
> >
> > We would have a print of aprox. 7 x 11 inches.
> >
> > So is the up & down sizing so good that I can produce images of just
> > about any size I want? What's the practical limit on the up side?
> >
> > -Lew Schwartz
> >
>
>
>
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