sRGB profile for the web?

[Emanuele]

Hi all,

I am wondering how to convert my images to sRGB format for the web? I am trying the ICCProfileTransformation process, selecting the image as Source Profile and selecting "web safe colors" in Target Profile, but I get this error: "Named color profiles are not supported as output"

Any help would be much appreciated.
Thank you,
E.

[jmtanous]

Hi,

Same problem here...

I am running PI on OSX.

Cheers,

Jose

[Nocturnal]

I don't have a web profile, I simply use the sRGB profile. To make sure this works I selected an arbitrary different profile in the ICCPT process and dragged the icon onto the target image. The process succeeded. You could try a different profile and see if that works. If it does there might be something wrong with the profile you're trying to use.

[Emanuele]

The problem is that I don't have an sRGB profile in the ICCtransform process.

[Nocturnal]

In that case it would probably be helpful if you told us what platform you use. What happens when you use a different profile? Are none working or just the web color one?

[Emanuele]

I am on OSX and none of them are working.

Is Web safe colors the same as sRGB?

[Nocturnal]

Sorry, I don't know. I do know that sRGB is generally considered a 'lowest common denominator' so it's a safe choice. They may not be exactly identical. Perhaps a google search can tell.

[Emanuele]

Sorry Sander,
what I meant was: should I have an option in there sayin sRGB? Because I dont have that option listed....

[Nocturnal]

Hi Emanuele,

I have no idea. On windows the list is pulled from the operating system. I imagine under OSX it's the same but there's no way for me to be sure.

[twade]

To all,

sRGB is the "standard" color space used over the Web.  "Web safe colors" are usually another way of saying/using the sRGB color space.

Wade

[Emanuele]

alright, thanks for that twade.

Problem still persists then. Gives me that error.

[twade]

Emanuele,

What color profile is the image currently using?  Could you provide a list of possible color profiles to choose from in OS X?  For example, what are the names of the profiles populated in the "Convert to the specified profile" drop-down list?  We may have to find a close match.

Wade

[Emanuele]

Wade,

Thanks for your help.
I have 4 profiles in that section.
3 of them are my monitor calibrated profiles - which I created using the calibrate tool in System Preferences- and the last one is Web Safe Colors.

[Juan Conejero]

Hi Emanuele,

It's strange that you have no sRGB profile on your Mac. Anyway, the solution is very easy: download it from ICC's website and install it on your machine.

Go to this web page:

http://www.color.org/srgbprofiles.xalter

and scroll down to about one half of the page untill you see the following file name with an "Accept terms of use" to the right:

sRGB_v4_ICC_preference.icc

This is an ICC v4 profile. It should work without problems on your Mac and of course it will work fine with PixInsight. Download the file and move it to your local color profiles folder. This folder is:

Library/ColorSync/Profiles

and is located on your home folder. That is, the complete path to this folder is:

/Users/<your-user-name>/Library/ColorSync/Profiles

where <your-user-name> is your actual user name on your Mac.

From now on PixInsight will recognize this profile and will show it on all color management tools. You can use it to convert your images for web deployment.

However, I personally don't recommend you embed a profile in images that are to be shown on the WWW. Just convert the image with ICCProfileTransformation, but then use AssignICCProfile with the "leave the image untagged" option enabled. From my experience, browsers with color management support (including Firefox) don't render images correctly when they have embedded profiles. So the safest option is to transform the images to sRGB but leave them untagged (no profile embedded). In this way they will be rendered well (so to say...) on all browsers, including those with and without color management capabilities.

Hope this helps. Back to 1.6.1 final polishment...

[Emanuele]

ahhhh! Thank you so much Juan!