Lightroom: Gamma adjustment (Publishing Manager)

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Hi,

I am a user of Lightroom 3.4.1 and would like to suggest to implement the possibility of adjusting a Gamma value in the "File Settings" section of the Lightroom Publishing Manager. As you can choose the "color space" it also would be very useful having the choice of setting Gamma to a value of 1.8, 2.0 or 2.2.

Just an example. Using an Apple iMAC I have a choice of printing with a HP Photosmart printer that is using Gamma 2.2 (factory default that cannot be changed) and I have a Canon PIXMA printer that uses the Apple Gamma value of 1.8.

Many thanks, regards
Matt
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bellarosso

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Posted 7 years ago

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jdv, Champion

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The "Apple" gamma of 1.8 a historical oddity left over from the early days (pre OS X) of monochrome desktop publishing and how that interacted with their new higher contrast, dark-on-light monitors. Even Apple no longer uses it in their hardware, and hasn't for years.

This is probably moot, however, as I'm reasonably sure that if you disable colour management in the printer, and let Lightroom do it, the gamma tag (if it exists) will be ignored.
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Chris Cox

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As John said, that should be completely unnecessary for printing, because the application print code can do the color conversions internally and ignore the printer defaults.
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bellarosso

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Ok, understood. But why are my printouts differently. I am using the UGRA recommendation regarding monitor setting, i.e.
- Luminance: 120cd/m2
- White Dot: 6.400 K
- Gradiation: 2.2 Gamma
- Color Space: eci_RGB_v2

Everytime I print the same picture on both printers (HP Photosmart or Canon Pixma) I get a high quality printout (as far as you can say this) but there is clearly a difference in color (in favour of the the Canon Pixma printer).

Any idea why. FYI, color space between monitor and application (Ps) is syncronized. Unfortunately Lr doesn't provide the same selection I only have AdobeRGB(1998), sRGB and ProPhoto RGB as an option. Gamma gradiation for these 3 options are 2.2, 1024points and 1.8.

I don't know if this makes the difference but it is really odd.

Regards, Matt
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Chris Cox

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Your monitor has nothing to do with ECI_RGB. Your monitor profile should be the profile for your monitor. And what do you mean by "colorspace between monitor and application is synchronized"? Photoshop and Lightroom should always read the display profile and correct for it. There is no need to set anything in the application to match the display.

The printing difference could be due to settings you chose when printing, or problems with the accuracy of the color profiles for the printers.
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bellarosso

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I have the option to adjust the monitor profile as I want. I have a bunch of icc-monitor profiles reflecting different color space settings for different use (based on workflow).

Secondly I can manually calibrate the monitor using the following options:
- Color Space (RGB or CMYK)
- Dot Gain
- Color Temperature (D50, D60, D65 or individually)
- White Dot
- Black Dot
- Color and Grey Gradiation
- Wide Garmut Settings

Furthermore I have the option to calibrate the monitor using a scanner eye that will be put on the screen creating an icc-profile that can be loaded afterwards.

Mostly I use a ready to go icc-monitor profile, e.g. AdobeRGB, sRGB or eci_RGBv2 (just to name a few) or some of the CMYK profiles like Euroscale_v2.

What I want to say is that I am able to adjust the monitor color management based on the job.

Example: If I want to have a syncronized workflow in AdobeRGB with Gamma 2.2, I am choosing the right icc-monitor profile (iMAC) and will choose the same color space in the color management of Ps or Lr. I also choose AdobeRGB in my Camera (Leica) and finally I adjust the printer driver (Canon) using AdobeRGB for proof printouts. So far so good - this works perfectly together.

But here in Europe many print shops work with eci_RGB_v2 (digital printing). The problem: Lr only provides sRGB, AdobeRGB and ProPhoto RGB as an option.

If I want to use a syncronized workflow (same way as my example) based on eci_RGBv2 I cannot use Lr for this work and have to switch to Capture One or Aperture. Both applications taking advantage of the color space profiles of the system, same way as Ps, and I can make a my choice.

With Lr I cannot use individual loaded color space and print profiles. I did not find a way to export files out of Lr using other color space options as mentioned above. Even if they are already exist on the system and used in other Adobe products like Ps or InDesign...

I like the Lr application but the limiting issue regarding color space is a disadvantage in comparison with Capture One and Aperture. This also applies for the underlying gradiation issue.

Regards, Matt