Lightness Adjustments

The last of the corrective functions is Lightness Adjustments, new in UFRaw 0.16. It offers tools to fine-tune the lightness of up to three different colors, lightening or darkening the hue of the chosen color all over the image. Lightness is not brightness. The function doesn't brighten up the whole image, just the color tone you have chosen with the function's pipette. To start, click the eyedropper symbol in the function's tab window. A new line with a slide control and three buttons shows up. The first is the reset button for this correction, the second is the pipette button to choose a color tone with, the third (with the X) is a button to remove this adjustment and its effect from the image. After clicking the pipette button in this row, you can set a measure point in the preview window by clicking on the color tone you want to lighten in the image. Then you can adjust the lightness of the chosen color in the image using the slide control. If the effect is not as desired, just click the reset button, then click the pipette button again, and choose another color spot in the picture. Try the slide control again. By clicking on the button with the eyedropper symbol below, you can call up three separate adjustments for three color hues at maximum.

Figure 2.10

The edited and corrected image. Three different control points have been set to lighten up the gray tones and the red and blue hue. The effect is only slightly visible, but it's a real improvement for this picture.

Figure 2.10

The edited and corrected image. Three different control points have been set to lighten up the gray tones and the red and blue hue. The effect is only slightly visible, but it's a real improvement for this picture.

The developing and correction of the image is now complete. The steps until now represent developing a RAW image. The actual editing begins after the handover to GIMP.

UFRaw does not offer a feature for sharpening images. You have to hand the image over to GIMP first. A click on the icon with GIMP mascot Wilbur at the bottom right does the trick. UFRaw shuts down and GIMP starts. The image is then displayed in GIMP.

Click the Save tab if you just want to save the image. The edited image will be stored as an 8-bit PPM file in the folder where you opened it. You can select the file format under the Save tab.

You can, however, crop the image in UFRaw before you hand it over to GIMP.

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Responses

  • dieter
    Where is the pipette button on gimp?
    6 years ago
  • ren
    How to brighten using gimp and ufraw?
    6 years ago

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