Photoshop JPG conversion issues once again

louise wrote:

I'm using a Nikon D40X and I have it set to take photos with
Adobe RGB

Are you shooting raw or jpeg? If you're shooting jpeg, then that's fine; if
you're shooting raw, the camera's color space setting doesn't matter and
you can ignore it.

I have PS set for the working space which is the calibrated
Spyder profile

No, that's very wrong. The result of the calibration is an output profile,
which should never be used as a working space. This should be set as your
monitor profile. The calibration software you use will probably have some
indication of how to do this, if it doesn't actually do it for you. If
you're using a Mac it's in System Preferences under Displays.

For your working space profile you should probably use Adobe RGB. If you
don't know why you want to use something else, you don't want to use
something else.

Therefore, I'm under an impression that I am working in RGB
straight through the printing process.

Right, but "RGB" is a color mode, not a color profile. Within RGB, there
are a number of different color profiles. sRGB is one of them, and is what
should be used for "random" output where you don't know what the viewer is
going to be, like web images, or quick-print labs.

BUT - when I put my photos on line
(www.madeline.zenfolio.com), I simply take the files I've
created (usually TIFFS) and I save as jpg highest quality.
This makes this an acceptable size for uploading to zenfolio.

Are you saying that at the point I am saving a tif as a jpg
for the purpose of uploading, I should then take the jpg
I've created and convert it to sRGB before uploading it?

Convert to sRGB (in Photoshop, Edit - Convert to Profile) before saving
the jpeg. That should take care of it. Keep your original tiff, of course.

--
Jeremy | | http://www.flickr.com/photos/100mph/

Jeremy Nixon wrote:
louise wrote:

I'm using a Nikon D40X and I have it set to take photos with
Adobe RGB

Are you shooting raw or jpeg? If you're shooting jpeg, then that's fine; if
you're shooting raw, the camera's color space setting doesn't matter and
you can ignore it.

I have PS set for the working space which is the calibrated
Spyder profile

No, that's very wrong. The result of the calibration is an output profile,
which should never be used as a working space. This should be set as your
monitor profile. The calibration software you use will probably have some
indication of how to do this, if it doesn't actually do it for you. If
you're using a Mac it's in System Preferences under Displays.

For your working space profile you should probably use Adobe RGB. If you
don't know why you want to use something else, you don't want to use
something else.

Therefore, I'm under an impression that I am working in RGB
straight through the printing process.

Right, but "RGB" is a color mode, not a color profile. Within RGB, there
are a number of different color profiles. sRGB is one of them, and is what
should be used for "random" output where you don't know what the viewer is
going to be, like web images, or quick-print labs.

BUT - when I put my photos on line
(www.madeline.zenfolio.com), I simply take the files I've
created (usually TIFFS) and I save as jpg highest quality.
This makes this an acceptable size for uploading to zenfolio.

Are you saying that at the point I am saving a tif as a jpg
for the purpose of uploading, I should then take the jpg
I've created and convert it to sRGB before uploading it?

Convert to sRGB (in Photoshop, Edit - Convert to Profile) before saving
the jpeg. That should take care of it. Keep your original tiff, of course.

I usually shoot raw - but if I leave the camera set to RGB,
that's what will be used on the occasions when I'm short on
space and want a jpg.

I gather I am very confused about what "working space"
actually means. Could you possibly explain/describe it for me?

I understand the monitor profile and it makes sense I
shouldn't be using it for anything but adjusting the
monitor. I do load it in automatically.

I contacted zenfolio with the questions about what profile
to use. They told me it's ok if I send RGB, they
automatically convert everything to sRGB before posting it.

Most of my photos will be printed on my HP 8250. The rest
will either be in zenfolio (they convert to sRGB), or they
will be printed my MPIX through Zenfolio - thus also
converted to sRGB.

I will change my working space profile to RGB and see how
the HP handles them. Should I have reason to expect any
problems? I usually don't have the printer color manage.

Thanks for your help.

BTW, is there a good book you might recommend?

Louise

On Jun 6, 2:39 pm, louise wrote:

I note you compare Safari and IE. What's your opinion of
color management if using Windows Firefox?

Louise, in case you didn't catch the news, Safari is available on
Windows now, and I presume that it will have colour profile
recognition in Windows as well...

Ray

Ray Macey wrote:
On Jun 6, 2:39 pm, louise wrote:

I note you compare Safari and IE. What's your opinion of
color management if using Windows Firefox?

Louise, in case you didn't catch the news, Safari is available on
Windows now, and I presume that it will have colour profile
recognition in Windows as well...

Ray

But it was broken into within about two hours, I believe...so be careful.

David

Ray Macey wrote:
On Jun 6, 2:39 pm, louise wrote:
I note you compare Safari and IE. What's your opinion of
color management if using Windows Firefox?

Louise, in case you didn't catch the news, Safari is available on
Windows now, and I presume that it will have colour profile
recognition in Windows as well...


I have a feeling it won't on Windows.

Greg
--
The ticket******* Tax Tracker:
http://www.ticketmastersucks.org/tracker.html

Dethink to survive - Mclusky

David J Taylor wrote:
Ray Macey wrote:
On Jun 6, 2:39 pm, louise wrote:
I note you compare Safari and IE. What's your opinion of
color management if using Windows Firefox?
Louise, in case you didn't catch the news, Safari is available on
Windows now, and I presume that it will have colour profile
recognition in Windows as well...

Ray

But it was broken into within about two hours, I believe...so be careful.

Not a problem if you're visiting sites you trust. And it's a beta,
anyway, be double careful.

Greg
--
The ticket******* Tax Tracker:
http://www.ticketmastersucks.org/tracker.html

Dethink to survive - Mclusky

louise wrote:

I gather I am very confused about what "working space"
actually means. Could you possibly explain/describe it for me?

A working space is a device-independent color space in which you store and
work on your images. sRGB is a working-space profile, as is Adobe RGB.

BTW, is there a good book you might recommend?

"Real World Color Management", by Bruce Fraser, Chris Murphy, & Fred Bunting.

--
Jeremy | | http://www.flickr.com/photos/100mph/

Ray Macey wrote:
On Jun 6, 2:39 pm, louise wrote:
I note you compare Safari and IE. What's your opinion of
color management if using Windows Firefox?

Louise, in case you didn't catch the news, Safari is available on
Windows now, and I presume that it will have colour profile
recognition in Windows as well...

Ray

thanks - very interesting and I'll look into it.

Jeremy Nixon wrote:

louise wrote:


I gather I am very confused about what "working space"
actually means. Could you possibly explain/describe it for me?


A working space is a device-independent color space in which you store and
work on your images. sRGB is a working-space profile, as is Adobe RGB.

What you would do if shooting Adobe RGB is set that as the default
working space for photoshop & set PS to give alerts when opening files
with untagged color space or color spaces not matching the current
working space. Then you can convert if it's different or assign sRGB if
unsure.

Then, you need to be careful about printing. In CS1 on the 'print with
preview' dialogue, I click "show more options" and set source space to
'document" then the print space is a color profile you download from
your printer or paper manufacturer.

There will be other color management settings in your printer's settings
dialogues, also probably hidden under advanced... you can probably
google a tutorial for your specific printer to get that right. Every
step of the way has to be correct.

BTW, is there a good book you might recommend?


"Real World Color Management", by Bruce Fraser, Chris Murphy, & Fred Bunting.



--
Paul Furman Photography
http://www.edgehill.net/1
Bay Natives Nursery
http://www.baynatives.com