convert 命令

常用示例

说明

convert is the primary command-line interface for ImageMagick, one of the most versatile image processing tools available. It supports over 200 image formats and can perform virtually any image transformation including format conversion, resizing, rotation, cropping, color manipulation, and applying artistic effects. The tool operates by reading one or more input images, applying a series of transformations specified by command-line options, and writing the result to an output file. Multiple operations can be chained together in a single command, with operations applied in the order specified. convert is widely used in web development for generating thumbnails, in photography workflows for batch processing, and in scientific computing for image analysis. Its scriptable nature makes it ideal for automation, though complex operations can consume significant memory and CPU time. In ImageMagick 7+, the command is being replaced by the unified magick command, though convert remains available for compatibility.

参数

-resize _geometry_

Resize image (e.g., 50%, 800x600, 800x)

-rotate _degrees_

Rotate image

-crop _geometry_

Crop image

-quality _value_

Compression quality (1-100)

-scale _geometry_

Scale image (faster, lower quality)

-thumbnail _geometry_

Create thumbnail

-blur _radius_

Blur image

-sharpen _radius_

Sharpen image

-negate

Invert colors

-monochrome

Convert to black and white

-flip

Flip vertically

-flop

Flip horizontally