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Author Topic: Woefully out of gamut  (Read 1146 times)

BobDavid

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Woefully out of gamut
« on: May 29, 2018, 02:40:54 pm »

I'm not sure it's appropriate to post this on the Colour  Management forum. If not, let me know.

I took this picture with a Pen F, tagged aRGB. I processed it in ACR. I soft proofed the Tiff for Epson Ultra Premium Luster paper, at relative and at absolute rendering intent. Either way, much of the red, orange/yellow, and shadowy green areas were way out of gamut.

I converted the Tiff to sRGB, and then to CMYK. When I converted back to sRGB, I still had to reign in the above mentioned colors. I think 99% of the picture is now "legal" for screen and for inkjet printing. I'd like to know how this picture displays on color managed displays. The print is lovely.

Over the last month or so, I've been trying to dial in files so they'll display well online. In the past, I wasn't too concerned about how my stuff looked on LCD/LED/OLED screens. Now I am.

Is it okay to tag a jpg file aRGB for viewing on a phone, tablet, desktop monitor?

Any and all comments are welcome. If it's useful, I can post the original Tiff downsized and converted to a JPG (tagged aRGB).

« Last Edit: May 29, 2018, 02:50:32 pm by BobDavid »
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Tim Lookingbill

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Re: Woefully out of gamut
« Reply #1 on: May 29, 2018, 03:26:35 pm »

Looks as I'ld expect a scene like that to look lit under convenience store lighting. Nothing clips in sRGB.

Now if that shot was taken with a sunset front lighting those candy wrappers I'ld suspect a lot more work would be involved in getting the right balance of hue, luminance and saturation to make it look as it should, but not accurate. If the brightly colored candy wrappers look right, it doesn't matter if they clip when viewing the print under a full spectrum light.

With colors such as in that scene the lighting will dictate how to make those colors look right clipped or not. Flat swaths of saturated color don't have a lot of luminance detail to turn into flat blobs of color but if they fluoresce under a print viewing light which I've seen with similarly saturated color prints, then I'ld put more work into finding a happy medium between luminance verses saturation.

The sRGB tagged photo looks great (even iconic) to me in color managed Firefox.
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digitaldog

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Re: Woefully out of gamut
« Reply #2 on: June 04, 2018, 12:28:04 pm »

Is it okay to tag a jpg file aRGB for viewing on a phone, tablet, desktop monitor?
Like sRGB, ONLY if the application/OS viewing the image is color managed. Otherwise, it's RGB mystery meat:



sRGB urban legend & myths Part 2

In this 17 minute video, I'll discuss some more sRGB misinformation and cover:
When to use sRGB and what to expect on the web and mobile devices
How sRGB doesn't insure a visual match without color management, how to check
The downsides of an all sRGB workflow
sRGB's color gamut vs. "professional" output devices
The future of sRGB and wide gamut display technology
Photo print labs that demand sRGB for output

High resolution: http://digitaldog.net/files/sRGBMythsPart2.mp4
Low resolution on YouTube: https://www.youtube.com/watch?v=WyvVUL1gWVs

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http://www.digitaldog.net/
Author "Color Management for Photographers".

BobDavid

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Re: Woefully out of gamut
« Reply #3 on: June 05, 2018, 02:41:14 pm »

Like sRGB, ONLY if the application/OS viewing the image is color managed. Otherwise, it's RGB mystery meat:


Thanks, Andrew.
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Tim Lookingbill

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Re: Woefully out of gamut
« Reply #4 on: June 05, 2018, 03:46:48 pm »

Glad I could help, Bob.
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