Re: Which internet labs print at what dpi?

The appropriate term should be image PPI but generally confused with DPI, is
one of the factors for quality output. If everything is at par, it is the
pixel dimension your image has that decide the quality. The more pixel the
image has the better the picture quality but the person who print your image
must know how to manage resolution. Every output device or printing machine
has its output resolution in DPI. Depend on type of machine, inkjet and
laser printer usually needs PPI to be 1/3 of its output DPI. Offsetprint
output resolution measures in LPI needs PPI to be 11/2 to 2X its required
LPI. Photo laser printer like Durst Lambda required 254DPI. Therefore, based
on same pixel dimension, the lower output resolution needed for printing
will yield a larger picture dimension i.e print size. Ask your lab about its
output dimension but usually they will say the larger the file size the
better and i.e more pixel in the image. If the pixel are not enough for your
required print size, the software will do resampling or interpolation i.e
create additional pixel by guessing intelligently. Hope you could figure
out.

"Arthur Small" <arthurh(NOSPAM)@nycap.rr.com> wrote in message
news:MwT%e.17046$7b6.7935@xxxxxxxxxxxxxxxxxxxxxxx
> Why don't you ask them?
>
> They may well print at LPI.
>
> www.alldigital.fotopic.net
>
>


.

Relevant Pages

  • Re: What size prints can I get?
    ... called controlled tests claiming that the human eye can resolve the equivalent of up to 660 PPI, based on arc minutes of angle of resolution. ... I said what I said because there are so many people that believe, rightly or wrongly, that to get the same "quality" - which is qualitative/subjective as well as quantitative - from a digital image as a well-exposed properly developed 35mm negative takes on the order of 16 mega pixels. ... This seems to be borne out by the rush to that MP resolution of the upper end digitals these days. ... This would produce in the range of 12 MP and could exceed 16 if the scanner can produce enough DPI without interpolating. ...
    (rec.photo.digital)
  • Re: Confused
    ... Certainly not dpi. ... When it comes to printing or displaying an image, the size it prints/displays at is set by the pixels-per-inch (ppi) parameter. ... But a Canon printer will print at 4,800 x 2400 dpi - dots per inch. ... because the printer lays down many dots to make up one pixel - in Canon's case, 32 ink dots in an 8 x 4 matrix to make one pixel of the image. ...
    (alt.graphics.photoshop)
  • Re: having a lab print my digital panorama file
    ... that is a very low resolution scan and may not result in very ... in the image size dialog box and see how many pixels per inch (that is PPI ... not dpi) your image contains at its current size. ... probably have sufficient quality to produce an acceptable print. ...
    (rec.photo.digital)
  • Re: having a lab print my digital panorama file
    ... With the file opened in Photoshop you will want to look ... in the image size dialog box and see how many pixels per inch (that is PPI ... not dpi) your image contains at its current size. ... probably have sufficient quality to produce an acceptable print. ...
    (rec.photo.digital)
  • Re: Saving images to specific size
    ... just reduce the pixel to around 95ppi and whatever ... If I don't care much about the quality then ... ppi (DPI) is a term which only has relevance to printing, ... picture to look on the screen, and then rescale it to that size. ...
    (alt.graphics.photoshop)