Emboss

This transformation lets you create an embossed version of an image. It works by combining the input image with its negative, offset by a small distance in a given direction.

Amount

The amount control lets you control how much of the emboss transformation is applied to the input image. You can apply a percentage of the transformation to the entire image, or you can specify an amount mask to restrict the effects of the transformation to only part of the input image.

Color Space

This control lets you select the HSV, HSL or RGB color space. If you select RGB, then the red, green, and blue channels of the input image are embossed separately and combined in the output image. If you select HSV or HSL, then only the V or L channel is affected, leaving the hue and saturation information unchanged.

Radius

Adjusting this slider controls the offset used to emboss the input image, in pixels. The smaller the offset, the finer the detail, but the less contrast in the result.

Method

This control lets you select how the results of embossing are applied to the input image.

Normal -- the embossed image is the result.

Shadow -- the input image is lightened where the embossed image is brighter than a mid-level gray and darkened where the embossed image is darker than a midlevel gray.

Angle

The embossing angle is the direction of the offset. Varying the angle is like changing the direction of the light source that illuminates the embossed image.

Height

This slider controls the apparent height the embossed image is raised. Increasing the height increases the contrast in the result image. You can compensate for the reduced contrast produced by choosing a small radius by increasing the height.