Re: [Leica] Photoshop help

["Jason Hall" <JASON@jbhall.freeserve.co.uk>]

I tried saving at 72 dpi, no difference.  The problem is not
photoshop, in photoshop they display ok, the problem only crops up
when I view the pics in an alternative image editor, or sometimes as a
web page.  I cant understand why they often look ok attached to an
email, then the artifacts crop up if I open them in micrsoft photo
editor!  Im left with no idea how it will look on the monitor of the
person Im sending it to!

14" monitor set to 16 bit hi colour 800x600, doesnt my browser use the
same setting?

I just tried saving a photo of someone elses from the web that
displayed perfectly in my browser, when I tried to open it up in PS I
got a dialogue box claiming the embedded greyscales/gamma were
different to my default and asking me to convert, I converted it and
it still looked fine, I then opened it in Photo Editor and the
artefacts were back!

One of my own pics 800x600 saved at 7 gives me a file of 95k which is
acceptable I spose, but its still displaying the wavey lines in the
large highlights!  Ill stick to a minimum of 7 in future and I guess
Ill just have to accept that its a fact of life with some pics.

I find the whole digital thing completely frustrating!

Thanks for the suggestions

Jason

- ----- Original Message -----
From: "Johnny Deadman" <john@pinkheadedbug.com>
To: "LUG" <leica-users@mejac.palo-alto.ca.us>
Sent: Tuesday, April 10, 2001 2:43 PM
Subject: Re: [Leica] Photoshop help


> on 4/10/01 8:14 AM, Gwpics@aol.com at Gwpics@aol.com wrote:
>
> > I think your problem may be that you are saving at 71 dpi and not
72 dpi thus
> > causing a moire effect withthe bands of the monitor. You will
always be
> > liable to get some mismatch if there are fine lines in the image
(I get
> > problems for instance with roof tiles on buildings I photograph
for my
> > clients) but it should not generally be a problem. But I think
that 1 dpi
> > could be the problem.
>
> I don't THINK this is the problem as the web is blind to dpi and
just looks
> at the pixels. So 71 dpi is the same as 72 dpi is the same as X dpi.
However
> worth a try.
>
> I think saving at 5 quality IS a problem, as I find anything less
than 7
> gives troubling artefacts. Even at 7 any areas of very fine tonal
gradation
> like broad highlights (flat skies etc) are going to give
posterisation.
> That's just jpegs for you.
>
> As a guideline, saving at 7 or 8 quality, an 800 pixel wide jpeg of
a
> monochrome image will save at about 60k for me, an RGB image more
like
> 130-150k.
>
> Finally, check that your browser isn't set to display colors in some
strange
> way, like 256 colors or something, as this will result in dithering
that
> will be really nasty. Check your image in another image editor
before
> blaming Photoshop. If it looks okay then the problem is with the way
your
> browser is set up.
> --
> John Brownlow
>
> http://www.pinkheadedbug.com
>
>