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GIMP TutorialsAdjusting Brightness and/or Contrast of a Photo in GIMP. (Showcase | Slideshow)

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tim

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Adjusting Brightness and/or Contrast of a Photo in GIMP.

Post#1 by tim » 22 Oct 2016, 16:11


For beginners who'd like to adjust brightness and/or contrast of an image in GIMP.
1. Open up your image in GIMP ("File" menu, then "Open", then select an image/photo that you want to edit and click "Open").
2. Click on "Colors" menu, then click on "Brightness-Contrast...".
Brightness_and_Contrast_01_menu_location.png
Brightness_and_Contrast_01_menu_location.png # (17.23 KiB) Viewed 961 times (Watermarked | Thumbnail)
3. "Brightness-Contrast" window will appear. Here you can drag the sliders left/right to adjust Brightness and/or Contrast.
Brightness_and_Contrast_02_drag_sliders_to_adjust.png
Brightness_and_Contrast_02_drag_sliders_to_adjust.png # (13.85 KiB) Viewed 961 times (Watermarked | Thumbnail)
4. You can click on the "Preview" check box to toggle on/off to see the difference between the before and after change. Once you're happy with the preview on, click "OK" to apply that brightness and contrast levels.
5. Once you're happy with you image, you can go to "File" menu, then "Export As..." to export your image as one of the image formats (.png, .jpg, ...etc). Or you can go to "File" menu, then "Save As..." to save your image as an .xcf file (GIMP's native file format) to work with later in GIMP.
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Post#2 by Pat625 » 27 Oct 2016, 20:45


Tin: good tips. Sometimes a little change of the Brightness/contrast is all that is needed to give a photo a perk. I find that sometimes all is needed is to check the White balance first (Filters/Auto/White Balance. Sometimes you get a weird result from this, so remember the Undo function. Other times, it is amazing what it does. I usually check this first when working on an old photo to restore. (Always work on a copy and save the original.)
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