6.9. Vignette

6.9. Vignette
	6. Lys- og skyggefiltra

6.9.1. Oversyn

In photography, vignetting is a reduction of the image brightness toward periphery. It is often an undesired effect due to camera settings or lens limitations. But it is also deliberately used to draw attention to the center of the image. «Vignette» can produce this effect.

Figur 17.127. Original images used for examples

Original

Filter applied with default options

6.9.2. Aktivering

You can find this filter in the image menu menu through Filters → Light and Shadow → Vignette….

6.9.3. Innstillingar

Figur 17.128. «Vignette» filter options

Presets, Preview, Split view

	Notat
	These options are described in Del 2, «Common Features».

Vignette shape

Circle
Square
Diamond

The shape of the vignette (ellipse or circle for example) depends on Proportion setting.

Radius

How far out vignetting goes as part of half image diagonal.

Radius = 0.700

Softness

TODO.

Softness = 0.100

Gamma

Falloff linearity controls the curve of the falloff from the center to periphery: set how fast is brightness reduced towards edges of the vignette.

Gamma = 1.00

Proportion

Proportion is particular: with the default value (maxi) 1.00, the vignette is a circle in a square image and an ellipse in a rectangular image. Reducing Proportion, this ellipse tends to a circle.

Squeeze

Aspect ratio to use:

0.0 = 1:1
0.5 = 2:1

Diamond shape, proportion = 0.0 and squeeze = 0.5
1.0 = completely squeezed vertically
-0.5 = 1:2
-1.0 = completely squeezed horizontally

	Notat
	To directly use squeeze factor as proportion, set Proportion to 0.0.

Center X, Center Y

Coordinates of vignette center. Origin is the upper left corner of the image. 1.00 is the right border of the image. The center can be placed outside of the image.

Rotasjon

Rotation of the vignette. The vignette keeps its shape.

Use the selection as input, Use the entire layer as input

	Notat
	These options are described in Del 2, «Common Features».