TOOL » IMAGE_MANIPULATOR » IMAGEMAGICK

Convert

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Man page:convert

Usage

Manipulate images.

shell

convert INPUT_OPTIONS INPUT_FILE OUTPUT_OPTIONS OUTPUT_FILE

Option	Description
`-strip`	Strip image of all profiles and comments.
`-trim`	Trim image edges.
`-interlace`	Type of image interlacing scheme. `none` `line` `plane` `JPEG` `GIF` `PNG`.
`-quality`	Valid only for JPEG or MPEG. 100 is lossless, 1 is worst quality.
`-sampling-factor`	Used by the JPEG encoder for chroma downsampling.

Option	Description
`-crop WxH+X+Y`	Crop the image to size WxH, starting from (X;Y).
`-resize`	Resize to WxH. By default it keeps the aspect ratio.
`-rotate`	Rotates the image by X degrees.
`-flip`	Mirror the image. ⇅
`-flop`	Mirror the image. ⇄
`+repage`	Reset virtual canvas.

Option	Description
`-negate`	Replace each pixel with its complementary color.
`-colorspace`	Set the image colorspace. Ex: `Gray`
`-threshold`	Apply simultaneous black/white threshold to the image. Ex: `50%`

Option	Description
`-bordercolor color`	Set the border color. Color specification is like `-fill`.
`-border geometry`	Surround the image with a border of color (set by `-bordercolor`).

Option	Description
`-alpha`	set: Activate alpha channel. background: Set any fully-transparent pixel to the background color, while leaving it fully-transparent.
`-channel type`	Change the channel subsequent operators will act.
`-fuzz`	On subsequent operators, colors within this distance are considered equal. Ex: `1%`
`-fill`	On subsequent operators, color to use when filling a graphic primitive. Ex: `none` `"#ffffff"`
`-floodfill`	Starting from (X;Y), any color that matches the color are filled with the `-fill` color. Ex: `+0+0 white`
`-opaque`	Change this color to the fill color within the image.
`-background`	Set the background color. Ex: `none`
`-flatten`	Flatten a sequence of images.
`-blur`	Reduce image noise and reduce detail levels. Ex: `0x1`
`-gaussian-blur`	Reduce image noise and reduce detail levels. Ex: `0.05`
`-level`	Adjust the level (contrast) of image channels. Ex: `10%,90%,2.0`

Format of values used on some options.

Color	Description
`#FFFFFF`	White color.
`none`	Transparent color.

Geometry	Description
`10`	Width given, height automatically selected to preserve aspect ratio.
`x10`	Height given, width automatically selected to preserve aspect ratio.