4.5. Engrave

4.5. Engrave
	4. 扭曲滤镜

4.5.1. Overview

图 17.41. Example for the “Engrave” filter

Original image

“Engrave” applied

This filter produces an engraving effect: the image is turned black and white and some horizontal lines of varying height are drawn depending on the value of underlying pixels. The resulting effect reminds of engravings found in coins and old book illustrations.

	注意
	The “Engrave” filter operates only on floating selections and layers with an alpha channel. If the active layer does not have an alpha channel please add it first.

4.5.2. Activating the filter

This filter is found in the image window menu under Filters → Distorts → Engrave….

4.5.3. Options

图 17.42. “Engrave” options

Preview: The result of your settings will appear in the Preview without affecting the image until you click on OK.
Height: This option specifies the height of the engraving lines. The value goes from 2 to 16.
Limit line width: If this option is enabled thin lines are not drawn on contiguous color areas. See the figure below for an example of this option result.

图 17.43. Example result of Limit line width option

Original image

Limit line width option enabled

Limit line width option disabled