help with color

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imported_julie
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Joined: Mon Aug 03, 2009 9:41 am

Postby imported_julie » Sun Jul 27, 2014 7:21 am

Hi

More questions I'm afraid
I usually correct in photoshop and curvemeister and save 2 copies, one psd and one jpeg
they are stored in different  files on the same computer and used for different things
I noticed today that they look very different on the same screen
I save from photoshop - I convert to RGB in photoshop (flattening all layers) before saving
I have attached a screen shot to demonstrate

can anyone tell me why they look so different
are they likely to print differently

Julie


Attachments
screen-shot-07-27-14-at-05-05-pm-jpg
screen-shot-07-27-14-at-05-05-pm-jpg (999 Bytes) Viewed 12915 times

imported_ganna
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Joined: Tue Nov 07, 2006 11:41 am

Postby imported_ganna » Mon Jul 28, 2014 10:27 am

Julie, are you using the same program to look at both, or are you looking ie. in Photoshop for psd and  windows viewer for jpg. That can make a difference. Also, are both in sRGB or Adobe RGB or is there a difference. Just what I can think of now.

imported_julie
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Joined: Mon Aug 03, 2009 9:41 am

Postby imported_julie » Tue Aug 05, 2014 1:12 am

Hi
sorry I took so long to acknowledge your answer.
I have been having computer problems.

are you using the same program to look at both, or are you looking ie. in Photoshop for psd and  windows viewer for jpg.

Yes that looks like what is happening.
Is this likely to affect he printing as I usually print form the JPEGS?

they are both sRGB. I just figured out how to check

Julie

imported_ganna
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Postby imported_ganna » Tue Aug 05, 2014 3:58 am

I'm not good with printing; Lightroom is where I print from. Greg will be of help with the setup of PS for printing

ggroess
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Postby ggroess » Tue Aug 05, 2014 1:15 pm

Week 5 Coming up...LOL

Greg

ggroess
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Postby ggroess » Tue Aug 05, 2014 2:50 pm

Julie and everyone else,
I realize that my answer while tongue in cheek did not really help anyone; therefore I am going to expand my answer a bit.

When comparing outputs you need to eliminate as many variables as possible.  If you are wondering about the file data, you have to open the files in the same software.  Photoshop will allow you to open multiple images and display them as tiles frames on the screen.  When you have a question about the output for print you have to make sure the screen and printer settings are translated correctly by Photoshop and or your printer.

My reference to week 5 is related to the CM 201 class of which Julie is a beta reader.  As a small preview everyone, week 5 will be dealing with outputs.  from printing to display and resolution. 

Greg

imported_ganna
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Joined: Tue Nov 07, 2006 11:41 am

Postby imported_ganna » Tue Aug 05, 2014 5:38 pm

Goodnews about the knowledge, bad news is I will have to start printing :P

Doug.S
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Joined: Sun Jun 02, 2013 7:42 pm

Postby Doug.S » Sat Aug 30, 2014 11:21 pm

Another "tool" is to layer each image in PS, and set top layer to difference mode, to see how much the images differ, and in what way

Doug.S

imported_ganna
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Postby imported_ganna » Sun Sep 07, 2014 2:36 pm

Greg, do you use a gray card or programs like X-rite colorchecker when shooting or to calibrate a specific camera/lens combination. What is your view on it?

ggroess
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Postby ggroess » Sun Sep 07, 2014 11:51 pm

I used to try to shoot a gray card...I really did... but overall I have had better results using an eye1 to calibrate my monitor.  I do that 2 X per month.  The changes are usually small but I am always surprised how much it actually does change.  I shoot RAW and process them through ACR to sRGB (this is the file type my printer wants me to send to them for my portraiture work).

I then profile with my printer (commercial) 2X per year.  They send me a calibrated file and I adjust my system to make the best print possible from them.  When I am satisfied with the results back to me,  I then re-set my eye1 settings so that I am close.

My process goes a little something like this.  I correct the image to my monitor using CM for color and then send it out to them.  They print one copy as is and one copy corrected to their standard.  The corrected version shows me the numeric differences for color and density.  I make some adjustments to the monitor profile so my corrections fall into their standard and re-send the print.  I really try for density more than color correctness.  I can be off by 2-4 points in color and still be acceptable.  If I am off in density by more than 3 points I re-adjust and re-print.

That's as far as I go. 

I have learned over the years that I can easily get caught up in chasing my tail in a slow death spiral trying to get it "perfect". I have to remind myself how much of the output process is out of my control once I FTP the files out...I usually stop the spiral after a week or two.

It comes up about 1 or twice a year. 
Greg


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