Operation Manual

Applying a Gamma Vignette
A Gamma vignette is an artistic adjustment that intensifies colors in the pixels affected
by the vignette.
Before Gamma Vignette adjustment After Gamma Vignette adjustment
To apply a Gamma vignette to an image
1 Select an image.
2 If the Vignette controls are not shown in the Adjustments inspector or the Adjustments
pane of the Inspector HUD, choose Vignette from the Adjustments pop-up menu (or
press Control-V).
3 Choose Gamma from the Type pop-up menu.
4 Adjust the amount of vignette to apply to the image by doing one of the following:
• Drag the Intensity slider to the left to decrease the amount of dark shading applied to
the edges of the image, or drag the slider to the right to increase the dark shading.
• Click the left or right arrow in the Intensity value slider to change the amount of dark
shading applied to the edges of the image, or drag in the value field.
The left arrow decreases the amount of dark shading applied to the edges of the image,
and the right arrow increases the dark shading.
• Double-click the number in the Intensity value slider, then enter a value from 0.0 to 1.0
and press Return.
Use the Intensity slider and value
slider to adjust the amount of
brightness removed from the
edges of the image.
5 To adjust the distance Aperture goes from the edge of the image, in pixels, to apply the
Vignette adjustment, do one of the following:
• Drag the Radius slider to the right to increase the number of pixels Aperture goes
toward the center of the image to apply the Vignette adjustment, or drag the slider to
the left to limit the vignette to the edges of the image.
582 Chapter 17 Making Image Adjustments