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Gimp Export as JPG - changing brightness


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Hi, anyone know how Gimp exports images as JPG, PNG, TIFF? As below, the exported image is always brighter, with less contrast, than the image as seen in Gimp.

I'm using sRGB v4 colour space, perceptual mapping. Image in Gimp on the left (32-bit gamma floating point, sRGB V4 ICC perceptual intent); exported JPG on the right in Win Photos.

image.thumb.png.cdeb3d8c90f97ed7d3e1861102841177.png

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I suspect it's not GIMP adjusting the brightness on export, but the Windows viewer application doing some runtime adjustments.  I've noticed it doing this if you are scrolling through a batch of images, it opens then quickly applies some kind of white balance adjustment.  Try opening the exported file in something else and see what it looks like.

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A quick google also shows that you can disable this effect:

 

Method: Disable automatic enhancement.

 

1.    Open Photo app.

2.    Click on Settings.

3.    Under the Viewing and editing tab.

4.    Turn off Automatically enhance my photos when they can be improved.

Edited by scitmon
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@scitmon interesting! Apparently Microsoft has removed the Photos option to disable Automatically Enhance.... so there's no way around it!

I've just installed irfanview as the default viewer for JPEGs and it's working fine.

Thanks for the answer!

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