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#2
02-04-2021, 09:25 PM
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You posted an "Un-edited Tiff loaded into Affinity Photo editor" that posted as a jpg.
Then you posted an Affinity-edited tif with the setting "use document profile" but the export screen doesn't say what that profile is. When opened in Photoshop to find out what the profile is, it says it's sRGB. So, to clarify this, how about uploading the tif here before loading it into affinity, and we'll see what the profile is when loaded into photoshop. Maybe it hasn't been confined to sRGB yet at that point. So the question is, where did it first become sRGB. If it's sRGB before editing, all is lost, but if not, there may be a possibility to set the working space in Affinity to something wider than sRGB (I don't know for sure, have never used Affinity). If you load a raw file into Lightroom, it uses the wide lightroom working space of Prophoto RGB. If you load a raw file into Photoshop, it will use whatever working space Photoshop has been set to. If you load some other file type into Photoshop, and if the Photoshop preferences have been set to pop up color warnings, it will tell you if the file's color space and the Photoshop working space don't match, and what each of those are. So, see if you can upload the TIF file from the camera before opening it in any software, and let's see what the color space is to begin with. 
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#3
02-04-2021, 09:41 PM
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By the way, I don't know if the version of Lightroom on the iPad is crippled compared to Lightroom Classic on a PC. Lightroom Classic lets you select the export file format, and if you select TIFF, it suggests setting the color space to ProPhoto RGB. If the version on the iPAD doesn't have these options, it's a problem for what you are trying to do.
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#4
02-04-2021, 10:59 PM
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My Lightroom is “light”. Free and some features grayed out. So I’m going with Affinity. The problem is on my side. The presets were RGB. I’m given options, see the screenshots. Lab16? See the formats, presets and profiles. There are others, could not capture in one shot.
The first image is the Raw file edit screen. We do all edits with the panels on the right, when done, hit “develop”. Have the option to convert document. I selected Lab16 and it created a profile as an example in screen shot. Get something I like, develop, choose format, pixel format and profile.   Edit: I’ll continue to experiment with formats other than RGB and post my results. Thank you for your help and any more suggestions welcomed.
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Last edited by etype2; 02-04-2021 at 11:11 PM.
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#5
02-04-2021, 11:14 PM
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For pixel format you want TIFF RGB 16 bit.
For ICC Profile, Prophoto RGB would likely be most compatible with Adobe products, but if not, Display P3 might work, but "Display" P3 sounds suspiciously like it might be P3 specifically for the iPad version of P3, not sure. Have to look up these profiles to see how they compare to ProPhoto, which will have to wait until tomorrow. Bedtime now, but if you upload TIFF RGB 16bit with Display P3 in rthe meantime, I can try it with Photoshop tomorrow afternoon.
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#7
02-05-2021, 05:23 AM
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Warning! First three links are 50 MB’s each.
https://visions4netjournal.com/wp-co...41402062A.tiff https://visions4netjournal.com/wp-co...62F4E8240.tiff In the third link below. Although the noisiest render, look at the detail and color toning in Judy Garland’s dress, which can’t be rendered when I shoot in Jpeg. https://visions4netjournal.com/wp-co...252309369.tiff This file was used to create the image in the first link above. https://visions4netjournal.com/wp-co...0-rotated.jpeg Notice the flat image which opens as a JPEG but can be rendered as a RAW file. It is both a Tiff and Jpeg file. If it opens as a JPEG in Photoshop, there may be a way to extract the Tiff, but not familiar with Photoshop. You can open the first three files in Photoshop with “LAB D50”. I read up on LAB 16 and learned it has a very wide color gamut far exceeding sRGB. It is supposed to be compatible with many devices and opened on my iPad. Still learning photo editing and may have messed up, but I rendered to my untrained eyes. You will need a wide color gamut display to view the added color information, but I think you can see the added detail. If this works, will continue to shoot images in RAW off the 15GP22 with good color content in efforts to display something close to 1954 NTSC color. Preview images. 
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#8
02-05-2021, 01:22 PM
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Here is the Tiff RGB16 with P3. 56 MB! https://visions4netjournal.com/wp-co...45906B6F9.tiff
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#9
02-05-2021, 02:22 PM
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Success at last!
The last 4 pix are recognized by Photoshop as the specified data type / color space. Is the TIFF RGB 16 before any editing? Photoshop recognizes the embedded profile properly as Display P3. I click "use the embedded profile" so that Photoshop doesn't use my default profile, Adobe RGB. It looks less saturated than many previous jpgs you posted. Photoshop properly makes adjustment when I move the image from my wide gamut monitor to my sRGB monitor, to make it look the same on both, so that is another indication that it is being handled correctly. If this version is before editing, you can proceed with editing and then export as Display P3 to maintain both the wide gamut and the look you want. Last edited by old_tv_nut; 02-05-2021 at 02:30 PM.
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#10
02-05-2021, 02:24 PM
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By the way, now that it's working, I would really like to see the door to the Emerald City, with all those green colors.
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#11
02-05-2021, 02:52 PM
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Yea! Good. I did a quick edit on the TIF RGB16.
When I first started shooting with TIFF last week, the tendency was to over saturate. I’m learning as I go and find only small adjustments are required primary with luminosity, shadow and highlights. I’m seeing increased detail and much improved shadow and highlight details. It’s been fun. I’ll post the door shot. Thanks for your help.
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#12
02-12-2021, 03:40 PM
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Does the 15GP22 reproduce extended green and red colors?
17 months ago, the H840CK15 with 15GP22 completed restoration. It was recapped, cleaned, aligned, grey scaled and color calibrated. The emissions read good on three cathodes. Since that time we only made minor adjustments with the user controls and maybe 100 hours of viewing time. We want to know if we can see extended colors on this set and 2 weeks ago, began shooting screenshot photos in TIFF as opposed to JPEG. Because my Sony A6300 won’t transfer tiff files to my iPad Pro 2 with P3 display so far, we used an iPhone X with software added which allows tiff photography. I’m just an amateur photographer and just beginning to understand photo editing. Much still to learn. Hardly a scientific, controlled experiment, we submit these 6 photos for evaluation. They were processed in Lightroom for iPad. Lightroom used the camera profile with no Adobe enhancements. We only have the iPad, iPhone and OLED television all with WCG P3 displays to display our images. I can’t see what the images look like on an RGB display for comparison, so would appreciate any input. These 6 photos were processed in tiff 16 bit, ProPhoto RGB. As a result the files are large between 35 and 55 MB’s. https://visions4netjournal.com/wp-co...A06CEEA6A.tiff https://visions4netjournal.com/wp-co...B285C2546.tiff https://visions4netjournal.com/wp-co...133C2B3C3.tiff https://visions4netjournal.com/wp-co...4674C833A.tiff https://visions4netjournal.com/wp-co...963ACA324.tiff https://visions4netjournal.com/wp-co...A4ABFA3F3.tiff
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Last edited by etype2; 02-12-2021 at 03:43 PM.
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#13
02-12-2021, 05:20 PM
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These look just as you would expect.
Viewed on an sRGB monitor with a non-color-managed viewer (irfanview), they are dull and desaturated. Viewed on a wide-gamut monitor with the same non-color-managed software, saturation looks normal. Viewed simultaneously on an sRGB monitor and a wide-gamut monitor side by side ( by using a copy of the original TIFF) in color managed software (Photoshop) the colors generally look normally saturated in both cases, with the facial and hair tones matching. For the doorman shot, the green of his epaulets, gloves, etc., is slightly yellower and desaturated on the sRGB monitor. The blue-green of his coat is slightly desaturated on the sRGB monitor. This is an indication that these two colors are outside the sRGB gamut as captured by your camera, while the skin and hair tones are inside sRGB. If the doorman and a copy are both viewed on the wide gamut monitor in Photoshop but the copy's color profile is converted to sRGB, you see similar effects to viewing the copy in Photoshop on the sRGB monitor. Summary: it looks like you are succeeding in showing what's on the 15GP22 if the end viewer has a wide-gamut monitor and color managed software. Last edited by old_tv_nut; 02-12-2021 at 05:43 PM.
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#14
02-12-2021, 05:54 PM
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Thank you for that. It’s worthwhile to know there is an observable difference as you described. Now it’s important to have color managed software which I don’t have. I’m thinking that in my situation, it would be better to use “Display P3” color profile.
Next, working on tiff photos from the A6300. These tests inspire me to pursue photography further and getting an Apple Pro laptop. As a side note, LG just added “Air Play” to my OLED which means I can see the photos on a compatible P3 large screen, (EDIT  without the limitations of a Chrome browser for smart TV.
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Last edited by etype2; 02-12-2021 at 06:02 PM.
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#15
02-26-2021, 02:38 PM
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Westinghouse H840CK15 with RCA 15GP22 1953 NTSC extended color gamut phosphors.
Wayne B. here at VideoKarma forum suggested we try rendering photos in TIFF file format to show 1953 NTSC extended color gamut color phosphors. Unlike JPEG, TIFF is an uncompressed format, that captures the full dynamic range of the photo and the photographer adjusts the color and light values. It’s similar to video monitor or television color calibration. Calibration is done to reduce clipping, crushed blacks, adjust grey scale, color balance, luminosity, white balance and gamma. Sorted out the problem we had and needed an SD card reader to transfer TIFF files from our Sony A6300 to iPad Pro 2 with wide color gamut P3 display. We have improved results over the iPhone X and edited the TIFF files with the professional Affinity Photo editor similar to Photoshop. Some of these photos were not edited at all, straight out the camera. I can say that the greens are rendered as I see them on the 15GP22 with the movie, Wizard Of Oz. With JPEG, the greens were muted. The reds are deeper, but I can’t say with authority they are 1953 NTSC correct. Images were photographed with the Sony A6300, rendered in Tiff 16 bit, color space P3 to match the color profile on my iPad, edited where necessary, and converted to JPEG or PNG to reduce the enormous file sizes of TIFF which are over 110 MB’s. Since the files were converted back to Jpeg they should display properly on an sRGB monitor, although you may not see the extended color rendering. If you see distortion or artifacts, I’d like to know. Having fun with this. https://visions4netjournal.com/wp-co...5F5608801.jpeg https://visions4netjournal.com/wp-co...6A2BAF9DD.jpeg https://visions4netjournal.com/wp-co...64E370AEB.jpeg https://visions4netjournal.com/wp-co...99A8E62FD.jpeg https://visions4netjournal.com/wp-co...44622B258.jpeg https://visions4netjournal.com/wp-co...5E6191B89.jpeg https://visions4netjournal.com/wp-co...B4C491C9D.jpeg https://visions4netjournal.com/wp-co...6974121E5.jpeg https://visions4netjournal.com/wp-co...8FC19C3BF.jpeg https://visions4netjournal.com/wp-co...F9B35F6FBD.png https://visions4netjournal.com/wp-co...24342E91B.jpeg https://visions4netjournal.com/wp-co...EA3E362AB.jpeg https://visions4netjournal.com/wp-co...9DC2A28E6.jpeg https://visions4netjournal.com/wp-co...B9EFD0649.jpeg https://visions4netjournal.com/wp-co...FCDAA919D.jpeg https://visions4netjournal.com/wp-co...FDAA1EADE.jpeg https://visions4netjournal.com/wp-co...021D633C3.jpeg https://visions4netjournal.com/wp-co...4127C7B27.jpeg https://visions4netjournal.com/wp-co...4B5F45B4A.jpeg https://visions4netjournal.com/wp-co...AC57457F5.jpeg
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Last edited by etype2; 02-26-2021 at 02:50 PM.
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