In GIMP, should I convert a TIFF tagged sRGB IEC61966-2.1 to GIMP built-in sRGB before exporting JPEGs for the web?
Asked 10/28/2020
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I’m opening TIFF files in GIMP 2.10 on Windows 10. The files have an embedded color profile: sRGB IEC61966-2.1. GIMP asks whether to convert the image to its built-in sRGB profile. I only want to crop and resize the images, then export them as JPEGs for posting on a blog. Should I choose Convert or Keep?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
5y ago
2 Answers
4
Don't convert - at all.
At import tell it not to convert.
At export tell it not to convert.
sRGB IEC61966-2.1 is "industry standard" RGB used for the web. Any time you do colour-space conversion you potentially change the colour balance. If you don't have a fully calibrated system this can make changes you can't even see or know about. Preserving standard sRGB throughout means less margin for error.
Originally by user57929. Source · Licensed CC BY-SA 4.0
user57929
5y ago
0
Generated from our catalog & community — verify before relying on it.
Choose Keep, or at least don’t worry much about it. In your case, the TIFF is already tagged with sRGB, which is the standard color space for web use. Converting from one sRGB profile to another sRGB profile usually makes little to no visible difference, and may only cause tiny, insignificant numerical changes.
Since your goal is simple editing and web export, preserving the existing sRGB profile is the safest, simplest choice. More broadly:
- If an image is already sRGB, keep it as sRGB.
- If an image uses a wider-gamut profile such as Adobe RGB and you’re preparing it for the web, convert it to sRGB before export.
- Keep the original TIFFs unchanged and edit/export copies.
So for these files: keep the embedded sRGB profile, crop/resize, and export JPEGs in sRGB for your blog.
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