composite 命令

常用示例

说明

composite is the ImageMagick tool for combining two or more images into a single image. It provides extensive compositing operations similar to layer blending in graphics editors, enabling complex image manipulation from the command line. The overlay image is placed over the background image according to the specified compose method and positioning. An optional mask image can control which parts of the overlay affect the final result. Common operations include watermarking, creating image collages, and applying visual effects. The gravity option provides convenient positioning (center, corners, edges) while geometry allows pixel-precise placement. Blend modes like multiply, screen, and overlay follow standard graphics compositing mathematics.

参数

-compose _METHOD_

Compositing operator: over, multiply, screen, overlay, darken, lighten, etc.

-geometry _GEOMETRY_

Position offset for overlay (+X+Y format).

-gravity _TYPE_

Anchor point: center, north, south, east, west, northeast, etc.

-blend _GEOMETRY_

Blend percentages for source and destination.

-dissolve _PERCENT_

Dissolve overlay into background at specified percentage.

-watermark _BRIGHTNESS_

Apply overlay as watermark with given brightness.

-tile

Tile the overlay image across the background.

-stegano _OFFSET_

Hide the overlay within the background image (steganography).

-stereo _OFFSET_

Create a stereo anaglyph image.

-density _VALUE_

Set image resolution.

-quality _VALUE_

Output compression quality (0-100).