Use the magick program to convert between image formats, resize, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and perform advanced image processing tasks.
Basic Format Conversion
Convert an image from JPEG to PNG effortlessly.
convert.sh
$ magick rose.jpg rose.png
Resizing Images
Reduce the image dimensions before saving to PNG format.
resize.sh
$ magick rose.jpg -resize 50% rose.png
Complex Operations & Text Rendering
Combine drawing, channels, blurring, and colors into a single pipeline.
text-effects.sh
$ magick -size 320x85 canvas:none -font Bookman-DemiItalic -pointsize 72 \
-draw "text 25,60 'Magick'" -channel RGBA -blur 0x6 -fill darkred -stroke magenta \
-draw "text 20,55 'Magick'" fuzzy-magick.png
-draw "text 25,60 'Magick'" -channel RGBA -blur 0x6 -fill darkred -stroke magenta \
-draw "text 20,55 'Magick'" fuzzy-magick.png
High-Quality Sigmoidal Resampling
Resize images with minimized artifacts using sigmoidal contrast and custom filters.
high-quality-resize.sh
$ magick input.png -colorspace RGB +sigmoidal-contrast 11.6933 \
-define filter:filter=Sinc -define filter:window=Jinc -define filter:lobes=3 \
-resize 400% -sigmoidal-contrast 11.6933 -colorspace sRGB output.png
-define filter:filter=Sinc -define filter:window=Jinc -define filter:lobes=3 \
-resize 400% -sigmoidal-contrast 11.6933 -colorspace sRGB output.png
Invoking Other Command-Line Tools
You can utilize other command-line tools through magick. Specify the sub-tool as the first argument or create a symbolic link to the binary—both approaches are equivalent.
symlink.sh
# Equivalent invocations:
$ ln -s magick identify
$ identify rose.jpg rose.png
$ magick identify rose.jpg rose.png
$ ln -s magick identify
$ identify rose.jpg rose.png
$ magick identify rose.jpg rose.png
Option Summary
The magick command recognizes these options. Click on any option to view detailed documentation.
| Option & Parameters | Description |
|---|---|
| -adaptive-blur geometry | adaptively blur pixels; decrease effect near edges |
| -adaptive-resize geometry | adaptively resize image with data dependent triangulation |
| -adaptive-sharpen geometry | adaptively sharpen pixels; increase effect near edges |
| -adjoin | join images into a single multi-image file |
| -affine matrix | affine transform matrix |
| -alpha | on, activate, off, deactivate, set, opaque, copy, transparent, extract, background, or shape the alpha channel |
| -annotate geometry text | annotate the image with text |
| -antialias | remove pixel-aliasing |
| -append | append an image sequence |
| -authenticate value | decipher image with this password |
| -auto-gamma | automagically adjust gamma level of image |
| -auto-level | automagically adjust color levels of image |
| -auto-orient | automagically orient image |
| -background color | background color |
| -bench iterations | measure performance |
| -bias value | add bias when convolving an image |
| -bilateral-blur geometry | non-linear, edge-preserving, and noise-reducing smoothing filter |
| -black-threshold value | force all pixels below the threshold into black |
| -blue-primary point | chromaticity blue primary point |
| -blue-shift factor | simulate a scene at nighttime in the moonlight |
| -blur geometry | reduce image noise and reduce detail levels |
| -border geometry | surround image with a border of color |
| -bordercolor color | border color |
| -brightness-contrast geometry | improve brightness / contrast of the image |
| -canny geometry | use a multi-stage algorithm to detect a wide range of edges in the image |
| -caption string | assign a caption to an image |
| -cdl filename | color correct with a color decision list |
| -channel type | apply option to select image channels |
| -charcoal radius | simulate a charcoal drawing |
| -chop geometry | remove pixels from the image interior |
| -clahe geometry | contrast limited adaptive histogram equalization |
| -clamp | set each pixel whose value is below zero to zero and any pixel above quantum range to quantum range |
| -clip | clip along the first path from the 8BIM profile |
| -clip-mask filename | associate clip mask with the image |
| -clip-path id | clip along a named path from the 8BIM profile |
| -clone index | clone an image |
| -clut | apply a color lookup table to the image |
| -connected-components connectivity | connected-components uniquely labeled (4 or 8 way connectivity) |
| -contrast-stretch geometry | improve contrast by stretching the range of intensity values |
| -coalesce | merge a sequence of images |
| -colorize value | colorize the image with the fill color |
| -color-matrix matrix | apply color correction to the image |
| -colors value | preferred number of colors in the image |
| -colorspace type | set image colorspace |
| -combine | combine a sequence of images |
| -comment string | annotate image with comment |
| -compare | compare image |
| -complex operator | perform complex mathematics on an image sequence |
| -compose operator | set image composite operator |
| -composite | composite image |
| -compress type | image compression type |
| -contrast | enhance or reduce the image contrast |
| -convolve coefficients | apply a convolution kernel to the image |
| -copy geometry offset | copy pixels from one area of an image to another |
| -crop geometry | crop the image |
| -cycle amount | cycle the image colormap |
| -decipher filename | convert cipher pixels to plain |
| -debug events | display copious debugging information |
| -define format:option | define one or more image format options |
| -deconstruct | break down an image sequence into constituent parts |
| -delay centiseconds | display the next image after pausing |
| -delete index | delete the image from the image sequence |
| -density geometry | horizontal and vertical density of the image |
| -depth value | image depth |
| -despeckle | reduce the speckles within an image |
| -direction type | render text right-to-left or left-to-right |
| -display server | get image or font from this X server |
| -dispose method | layer disposal method |
| -distribute-cache port | launch a distributed pixel cache server |
| -distort type coefficients | distort image |
| -dither method | apply error diffusion to image |
| -draw string | annotate the image with a graphic primitive |
| -duplicate count,indexes | duplicate an image one or more times |
| -edge radius | apply a filter to detect edges in the image |
| -emboss radius | emboss an image |
| -encipher filename | convert plain pixels to cipher pixels |
| -encoding type | text encoding type |
| -endian type | endianness (MSB or LSB) of the image |
| -enhance | apply a digital filter to enhance a noisy image |
| -equalize | perform histogram equalization to an image |
| -evaluate operator value | evaluate an arithmetic, relational, or logical expression |
| -evaluate-sequence operator | evaluate expression for an image sequence |
| -extent geometry | set the image size |
| -extract geometry | extract area from image |
| -family name | render text with this font family |
| -features distance | analyze image features (e.g. contrast, correlations) |
| -fft | implements the discrete Fourier transform (DFT) |
| -fill color | color to use when filling a graphic primitive |
| -filter type | use this filter when resizing an image |
| -flatten | flatten a sequence of images |
| -flip | flip image in the vertical direction |
| -floodfill geometry color | floodfill the image with color |
| -flop | flop image in the horizontal direction |
| -font name | render text with this font |
| -format string | output formatted image characteristics |
| -frame geometry | surround image with an ornamental border |
| -function name | apply a function to the image |
| -fuzz distance | colors within this distance are considered equal |
| -fx expression | apply mathematical expression to an image channel(s) |
| -gamma value | level of gamma correction |
| -gaussian-blur geometry | reduce image noise and reduce detail levels |
| -geometry geometry | preferred size or location of the image |
| -gravity type | horizontal and vertical text placement |
| -grayscale method | convert image to grayscale |
| -green-primary point | chromaticity green primary point |
| -help | print program options |
| -hough-lines geometry | identify lines in the image |
| -identify | identify the format and characteristics of the image |
| -ift | implements the inverse discrete Fourier transform (DFT) |
| -illuminant type | reference illuminant |
| -implode amount | implode image pixels about the center |
| -insert index | insert last image into the image sequence |
| -integral | calculate the sum of values (pixel values) in the image |
| -intensity method | method to generate an intensity value from a pixel |
| -intent type | type of rendering intent when managing image color |
| -interlace type | type of image interlacing scheme |
| -interline-spacing value | space between two text lines |
| -interpolate method | pixel color interpolation method |
| -interword-spacing value | space between two words |
| -kerning value | space between two characters |
| -kuwahara geometry | edge preserving noise reduction filter |
| -label string | assign a label to an image |
| -lat geometry | local adaptive thresholding |
| -layers method | optimize or compare image layers |
| -level value | adjust the level of image contrast |
| -limit type value | pixel cache resource limit |
| -linear-stretch geometry | linear with saturation histogram stretch |
| -liquid-rescale geometry | rescale image with seam-carving |
| -list type | Color, Configure, Delegate, Format, Magic, Module, Resource, or Type |
| -log format | format of debugging information |
| -loop iterations | add Netscape loop extension to your GIF animation |
| -mask filename | associate a mask with the image |
| -mattecolor color | frame color |
| -median radius | apply a median filter to the image |
| -mean-shift geometry | delineate arbitrarily shaped clusters in the image |
| -metric type | measure differences between images with this metric |
| -mode radius | make each pixel the 'predominant color' of the neighborhood |
| -modulate value | vary brightness, saturation, and hue |
| -moments | display image moments |
| -monitor | monitor progress |
| -monochrome | transform image to black and white |
| -morph value | morph an image sequence |
| -morphology method kernel | apply a morphology method to the image |
| -motion-blur geometry | simulate motion blur |
| -negate | replace each pixel with its complementary color |
| -noise radius | add or reduce noise in an image |
| -normalize | transform image to span the full range of colors |
| -opaque color | change this color to the fill color |
| -ordered-dither NxN | ordered dither the image |
| -orient type | image orientation |
| -page geometry | size and location of an image canvas |
| -paint radius | simulate an oil painting |
| -perceptible | clamp small pixel values near zero to epsilon |
| -ping | efficiently determine image attributes |
| -pointsize value | font point size |
| -polaroid angle | simulate a Polaroid picture |
| -poly terms | build a polynomial from image sequence and terms |
| -posterize levels | reduce image to a limited number of color levels |
| -precision value | set maximum number of significant digits printed |
| -preview type | image preview type |
| -print string | interpret string and print to console |
| -process image-filter | process the image with a custom image filter |
| -profile filename | add, delete, or apply an image profile |
| -quality value | JPEG/MIFF/PNG compression level |
| -quantize colorspace | reduce image colors in this colorspace |
| -quiet | suppress all warning messages |
| -rotational-blur angle | radial blur the image |
| -raise value | lighten/darken image edges to create a 3-D effect |
| -random-threshold low,high | random threshold the image |
| -red-primary point | chromaticity red primary point |
| -regard-warnings | pay attention to warning messages |
| -region geometry | apply options to a portion of the image |
| -remap filename | transform image colors to match this set of colors |
| -render | render vector graphics |
| -repage geometry | size and location of an image canvas |
| -resample geometry | change resolution of an image |
| -reshape geometry | reshape the image |
| -resize geometry | resize the image |
| -respect-parentheses | settings remain in effect until parenthesis boundary |
| -roll geometry | roll an image vertically or horizontally |
| -rotate degrees | apply Paeth rotation to the image |
| -sample geometry | scale image with pixel sampling |
| -sampling-factor geometry | horizontal and vertical sampling factor |
| -scale geometry | scale the image |
| -scene value | image scene number |
| -seed value | seed a new sequence of pseudo-random numbers |
| -segment values | segment an image |
| -selective-blur geometry | selectively blur pixels within a contrast threshold |
| -separate | separate an image channel into a grayscale image |
| -sepia-tone threshold | simulate a sepia-toned photo |
| -set attribute value | set an image attribute |
| -shade degrees | shade the image using a distant light source |
| -shadow geometry | simulate an image shadow |
| -sharpen geometry | sharpen the image |
| -shave geometry | shave pixels from the image edges |
| -shear geometry | slide one edge of the image along the X or Y axis |
| -shuffle mode | reorder sequence based on ascending, descending, or random mode |
| -sigmoidal-contrast geometry | increase contrast without saturating highlights or shadows |
| -smush offset | smush an image sequence together |
| -size geometry | width and height of image |
| -sketch geometry | simulate a pencil sketch |
| -solarize threshold | negate all pixels above the threshold level |
| -sort-pixels | sort pixels within each scanline in ascending intensity order |
| -splice geometry | splice the background color into the image |
| -spread radius | displace image pixels by a random amount |
| -statistic type geometry | replace pixel with statistic from neighborhood |
| -strip | strip image of all profiles and comments |
| -stroke color | graphic primitive stroke color |
| -strokewidth value | graphic primitive stroke width |
| -stretch type | render text with this font stretch |
| -style type | render text with this font style |
| -swap indexes | swap two images in the image sequence |
| -swirl degrees | swirl image pixels about the center |
| -synchronize | synchronize image to storage device |
| -taint | mark the image as modified |
| -texture filename | name of texture to tile onto the image background |
| -threshold value | threshold the image |
| -thumbnail geometry | create a thumbnail of the image |
| -tile filename | tile image when filling a graphic primitive |
| -tile-offset geometry | set the image tile offset |
| -tint value | tint the image with the fill color |
| -transform | affine transform image |
| -transparent color | make this color transparent within the image |
| -transparent-color color | transparent color |
| -transpose | flip image in vertical direction and rotate 90 degrees |
| -transverse | flop image in horizontal direction and rotate 270 degrees |
| -treedepth value | color tree depth |
| -trim | trim image edges |
| -type type | image type |
| -undercolor color | annotation bounding box color |
| -unique-colors | discard all but one of any pixel color |
| -units type | the units of image resolution |
| -unsharp geometry | sharpen the image |
| -verbose | print detailed information about the image |
| -version | print version information |
| -view | FlashPix viewing transforms |
| -vignette geometry | soften the edges of the image in vignette style |
| -virtual-pixel method | access method for pixels outside boundaries of image |
| -wave geometry | alter an image along a sine wave |
| -wavelet-denoise threshold | removes noise from image using a wavelet transform |
| -weight type | render text with this font weight |
| -white-point point | chromaticity white point |
| -white-threshold value | force all pixels above the threshold into white |
| -word-break type | sets line break behavior (normal or break-word) |
| -write filename | write images to this file |