Commons:Featured picture candidates/File:James Russell Lowell - 1855.jpg

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File:James Russell Lowell - 1855.jpg, featured[edit]

Voting period is over. Please don't add any new votes.Voting period ends on 30 Sep 2016 at 02:19:30 (UTC)
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James Russell Lowell
it's gray and maybe a random gray is ever gray because gray haven't colors? --The Photographer 20:15, 23 September 2016 (UTC)[reply]
You still need to know how to map the gray-scale numbers in the file into actual gray-scale colors - gray is also a color. That's what the embedded color profile does. Without it, the application has to guess, and that guess may be different for different applications and monitors and not give a consistent presentation. It is like telling the temperature is 32.5 but not stating if the unit is °C, °F or K. If you are in the states you could think it was °F if you were in Denmark you would perhaps think °C, but actually it could be in K. -- Slaunger (talk) 20:44, 23 September 2016 (UTC)[reply]

@The Photographer and Slaunger: There is no widely-recognised standard for greyscale colorspaces; it's somewhat odd, at the least, to call for something to be used that doesn't currently exist. Adam Cuerden (talk) 03:34, 24 September 2016 (UTC)[reply]

I am not sure about this problem because is not my expert area, however, I know that @Colin: know about this issue and could be a good idea ask him about that. --The Photographer 12:53, 24 September 2016 (UTC)[reply]
I have striked my oppose. I feel very confident that it is very wrong not to have an embedded color profile for B&W images, as a browser is just guessing how to map grayscale numbers in a file into actual gray-scale colors. But I agree with you that it is not easy to find consistent advice on how to do this best, and moreover after checking 25 randomly picked B&W historical photographs from our FP archive I can see that about 60% of all images have no color-space metadata and no embedded color profile exactly as this nomination. And for the remaining 40%, a wide range of color profiles (EPSON Gray - Gamma 1.8, Generic RGB Profile, sRGB, AdobeRGB,and iMac etalonne) have been used with an approximate equal distribution. It all seems very random. Thus, it seems unfair to pick randomly at this nomination. I think we should try and figure out a guideline for color space information in B&W photographs in general on Commons, as it is not clear what is right to do. -- Slaunger (talk) 20:13, 25 September 2016 (UTC)[reply]
Adam Cuerden, I'm sure we discussed this before for a b&w image. Do you recall if it is one of yours, and can you find it. Otherwise I'll need to search because we did discover something at the time. There's more to colour profile than colour -- there's also the gamma, which is how the 0..255 scale maps onto brightness on your monitor. The scale from black to white is not linear. So I think there is still merit in embedding an sRGB profile. -- Colin (talk) 13:57, 24 September 2016 (UTC)[reply]
While that's doable, doesn't that massively increase the file size, while in theory decreasing its fidelity if there's more than 8 bits of greyscale (don't think that's true here, but could easily be)? Adam Cuerden (talk) 18:31, 24 September 2016 (UTC)[reply]
Confirmed results:
Result: 10 support, 0 oppose, 0 neutral → featured. /INeverCry 08:53, 26 September 2016 (UTC)[reply]
This image will be added to the FP gallery: People
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