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Color Calibrations

Discussion

9 replies
Posted by Pete D on March 21, 2010 at 4:03 PM
Color Calibrations
I've been using an Epson R1800 for a while now. Because the canned profile gave pretty lousy prints across the board, I had custom profiles done. Many of the prints seem fine, however, in certain cases I can't get remotely close to what the calibrated monitor shows.
I'm using Pantone's HueyPRO to calibrate.

Most recently, I see this gross mis-match in a print of a backyard shot of a woodpecker. It was taken in overcast, but the color corrects very nicely (as I see it) with "Eddie Tapp's 90% method." I'm not qualified to endorse the procedure, I'm just telling you what I did. The image looks nice to me on-screen, but printed it has a pinkish cast.

I checked the print nozzles, ink is full, etc. I'm sort of at a loss here because I printed with the little sister printer (R800) for a few years with no such problems.

Does anyone have any suggestions? I'm tired of wasting photo paper and ink.

Pete D.
image attached
Posted by Keith Bauer on March 21, 2010 at 4:21 PM
If you could outline your color managed workflow, we might be able to see if there are any issues. I'm talking about color spaces you use to manage your images, your print process, rendering intent, print driver settings for all of the color specific settings.
Posted by Mark Stahlke on March 21, 2010 at 4:53 PM
The image prints pinkish because it has a red cast. I suggest revisiting the color correction work.

Using the Colorzilla plugin in Firefox, I can scroll around in the image and see the RGB values under the cursor. The red value is always higher than blue and green.

Some examples of RGB values:
Tip of the birds bill: 37,25,25
White wing spot: 198,181,168
Black of wing: 16,11,10
Brightest part of throat: 245,237,232
Posted by Pete D on March 21, 2010 at 5:07 PM
Thanks for offering to think about this.

The camera is set to use Adobe RGB.
I shoot raw files, then convert to 16 bit Adobe RGB (1998) using Adobe Camera Raw.
Photoshop itself as working space set to Adobe RGB (1998).
As I mentioned, my monitor is calibrated with a HueyPRO.
I make an image look like I want in Photoshop, then proceed to the print process.

My printer is an Epson R1800.
Color Management is done by the document (Profile: Adobe RGB (1998))
Color Handling: Photoshop Manages Colors
Printer Profile: a profile I had made, printer & paper specific
Rendering Intent: perceptual

in page setup
Color Management
ICM is selected
"Off" is checked (No Color Adjustment)

Pete D.
Posted by Paul Breitkreuz on March 21, 2010 at 6:33 PM
Pete, your settings all look good from your information posted here. I use a 1280, rarely, and a 2400, very often with a custom profile. Although, I use the Relative Colormetric with Black Point Compensation checked instead of Perceptual rendering.
Just looking at the image and confirmed by Mark's tests, it does appear on the red side to me, on a calibrated monitor here also.
IMHO I would think the pink cast you are getting in the print is coming from the slight reddish cast. You might run a cast correction procedure and leave the colors alone otherwise and run one more print. I fully understand your frustration with paper and ink consumption, I have plenty of used items laying around me right now. Good luck.
Posted by Guy Tal on March 21, 2010 at 6:38 PM
Pete,

I agree with Paul. Don't use perceptual intent - it remaps all colors rather than just the ones that are out of gamut. The results can be hard to predict. Relative colorimetric only remaps colors that are out of gamut and leaves the rest untouched. I suggest soft-proofing with gamut warnings turned on. If any warnings are visible, use the method I described on Bret Edge's blog:

http://bretedge.wordpress.com/2010/01/28/ask-an-expert-soft-proofing

Guy
Posted by Dan Borzynski on March 21, 2010 at 6:38 PM
Pete -

I am seeing a reddish cast in the displayed file as well.

I took the liberty of downloading the image and bringing it into Photoshop to look at the numbers (it has already been deleted from my hard drive). Looking at individual pixels with the eyedropper tool, almost every pixel tested has a strong red component. The blacks are especially heavily biased towards the red channel. You don't see it in the whites since most of those pixels are already starting at 235+ in each channel and that is a pretty light color as it is.

Your PS settings look correct. Assuming that you are using a Windows machines, do the printer settings in the Printer Window match? Is there any common denominator in the files that you can't get to print correctly?

I actually like the color cast you have going on in the image, so the trick will be to print it correctly. Without seeing the print, the only thing I can suggest would be trying a cooling filter. Divide the image into several stripe and apply the cooler filter in progressively heavier strengths and decide which one you like the best. Maybe repeat to zero in on the degree of strength for the cooling filter.

Posted by Preston Birdwell on March 21, 2010 at 6:41 PM
Pete,

I can see a reddish cast in the image you posted. As Mark says, you might want to revisit the color adjustments.

Your color management settings look good. One thing I don't see is "Use Black Point Compensation" from Print with Preview in PS.

--P
Posted by Dan Borzynski on March 21, 2010 at 11:57 PM
Pete -

I tried to click on your website to see where you were (I'm in Dayton) but Google was coming up. Not sure if you knew that was happening.
Posted by John Mumaw on March 22, 2010 at 5:43 AM
Preston. Dan and Mark are correct...there is a pronounced red color cast in this image.
It's quite easy to correct using the gray eyedropper in Levels/Curves.