I have been wondering for a while now why my beautiful colour photographs end up looking desaturated and washed out every time I upload them to Ipernity (and Flickr for that matter). Below is an example of what I'm talking about:
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| ipernity colour |
The image on the right is how my photo looks in lightroom, the one on the left is what happens when I send it to Ipernity; big difference. This obviously frustrated me because I just was not able to convey what I needed to in terms of colour and saturation and pictures with impact ended up pretty average.
Tonight I embarked on an experiment to try and find out why.
When I export from Lightroom, from RAW (NEF) to JPG I can choose one of 3 options: sRGB, AdobeRGB (1998) and ProPhoto RGB. Without being a guru of color spaces, sRGB is the standard proposed by Microsoft and HP in 1995 for print and web; proPhoto is a standard developed by Kodak for photographic output and is the largest of the colour spaces and AdobeRGB was developed in 1998 to encompass the colours achievable on CMYK printers. For the more technically minded here is an article detailing why proPhoto RGB is far superior to the others.
Anyway the trouble seems to lie in how the photo-sharing websites handle the different colour spaces. Flickr and Ipernity (and I would love clarification on this) seem to handle the sRGB colour space quite well but their interpretations of the other two leave a lot to be desired squarely with how the browsers handle the colour spaces (see Don's comment below) - Safari is the only browser to display these images correctly. The proof of the pudding is in the eating and here are 3 of the same photos exported using the different colour profiles.
1. Worst is Prophoto RGB (although this is the preferred colour space for photography)
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| Prophoto RGB |
2. In second place comes AdobeRGB (better but not quite there)
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| Adobe RGB |
3. The best overall representation comes from the older sRGB which is a pity really.
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| Pine and Mist (sRGB) |
In closing, none of these gives a true representation of what I see on the screen for some unknown reason. The truest approximation can be seen in the screen shot at the start of this article and that was a screen grab ... maybe some colour deity can explain this to me.
Save sRGB when you export from Lightroom and other software to have the best possible representation of your photo on Ipernity and let's hope the photo websites non-Safari browsers all get their Prophoto RGB ducks in a row sometime soon.
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Bigoode [Frozen account]pro says:
it's not paper !
so it's not real colors ....
We have to deal with this and remind that pix have to be printed ;-) (i guess)
very interesting post !
thanks Stuart, i wish you to find some peacefull moments ;-)
Shine on
--
Seen in a user home page (?)
Stuart replies:
Bigoode [Frozen account]pro replies:
lol
Rob Youngpro says:
www.imagescience.com.au/Knowledge/DFP/DFP.html
It is mostly aimed at preparing an image for printing but covers the basics of colour management.
As I understand it, sRGB is the safest colour space to use because the majority of display devices (monitors) interpret this colour information the same way.
Stuart replies:
Rob Youngpro replies:
Jerry Lee says:
other than colour-space, ipernity down-samples the jpeg compression further, meaning if you download your original of your post, you'll get a smaller size file. Like bigoode pointed out, thats the fact of life with computers, the ideal is only a fragment of our imagination ...
even in real world with ink and paper, colour matching is only a laboratory exercise, all colours are viewed with surrounding colours reflected on them as in "Ray-Tracing"
Rob Youngpro replies:
The originals are sharp, honest! :-)
Дон Андреpro says:
Stuart replies:
I've updated the post with due kudos to the one who solved the mystery, thanks again.
Stuart edited this comment 11 months ago.
Дон Андреpro replies:
And I agree, Firefox could really improve here.
The topic regarding the different colour spaces and which to choose is complex. The basic essence is that a larger colour space (such as AdobeRGB) will give you a greater choice of different colours, but less fine steps, whereas a smaller colour space (such as sRGB) will leave you with a little less different colours, but more and finer steps between them. The reason is that each colour space can encode only the same number of 16,7 million colours with 24bit (RGB = 3x8bit)
But how each monitor displays this information and how the printer interprets it (printers are using CMYK and not RGB) is something that I don't know about either.
When you read a little bit about HDR you'll realize that whatever change there'll be (e.g. going to 16bit per channel), it will affect the whole chain from image capture to image display. As I understood it, our everyday LCD's are still so bad at displaying colour that sRGB is more than enough.
Jerry Lee says:
i use safari but have problems with text handling and send mail functions, appears Ipernity server does not accept HTML from safari either.