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.TH convert 1 "Date: 2009/01/10 01:00:00" "ImageMagick"
.SH NAME
convert \- convert between image formats as well as resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more.
.SH SYNOPSIS
.TP
\fBmagick convert\fP [\fIinput-options\fP] \fIinput-file\fP [\fIoutput-options\fP] \fIoutput-file\fP
.SH OVERVIEW
The \fBconvert\fP program is a member of the ImageMagick(1) suite of tools. Use it to convert between image formats as well as resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more.
For more information about the convert command, point your browser to file:///opt/alt/alt-ImageMagick/usr/share/doc/ImageMagick-7/www/convert.html or https://imagemagick.org/script/convert.php.
.SH DESCRIPTION
Image Settings:
\-adjoin join images into a single multi-image file
\-affine matrix affine transform matrix
\-alpha option activate, deactivate, reset, or set the alpha channel
\-antialias remove pixel-aliasing
\-authenticate value decrypt image with this password
\-attenuate value lessen (or intensify) when adding noise to an image
\-background color background color
\-bias value add bias when convolving an image
\-black-point-compensation
use black point compensation
\-blue-primary point chromaticity blue primary point
\-bordercolor color border color
\-caption string assign a caption to an image
\-cdl filename color correct with a color decision list
\-clip clip along the first path from the 8BIM profile
\-clip-mask filename associate a clip mask with the image
\-clip-path id clip along a named path from the 8BIM profile
\-colorspace type alternate image colorspace
\-comment string annotate image with comment
\-compose operator set image composite operator
\-compress type type of pixel compression when writing the image
\-decipher filename convert cipher pixels to plain pixels
\-define format:option
define one or more image format options
\-delay centiseconds display the next image after pausing
\-density geometry horizontal and vertical density of the image
\-depth value image depth
\-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
\-dither method apply error diffusion to image
\-encipher filename convert plain pixels to cipher pixels
\-encoding type text encoding type
\-endian type endianness (MSB or LSB) of the image
\-family name render text with this font family
\-features distance analyze image features (e.g. contrast, correlation)
\-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
\-font name render text with this font
\-format "string" output formatted image characteristics
\-fuzz distance colors within this distance are considered equal
\-gravity type horizontal and vertical text placement
\-green-primary point chromaticity green primary point
\-intensity method method to generate intensity value from pixel
\-intent type type of rendering intent when managing the image color
\-interlace type type of image interlacing scheme
\-interline-spacing value
set the space between two text lines
\-interpolate method pixel color interpolation method
\-interword-spacing value
set the space between two words
\-kerning value set the space between two letters
\-label string assign a label to an image
\-limit type value pixel cache resource limit
\-loop iterations add Netscape loop extension to your GIF animation
\-matte store matte channel if the image has one
\-mattecolor color frame color
\-metric type measure differences between images with this metric
\-moments report image moments
\-monitor monitor progress
\-orient type image orientation
\-page geometry size and location of an image canvas (setting)
\-ping efficiently determine image attributes
\-pointsize value font point size
\-precision value maximum number of significant digits to print
\-preview type image preview type
\-quality value JPEG/MIFF/PNG compression level
\-quiet suppress all warning messages
\-read-mask filename associate a read mask with the image
\-red-primary point chromaticity red primary point
\-regard-warnings pay attention to warning messages
\-remap filename transform image colors to match this set of colors
\-repage geometry size and location of an image canvas
\-respect-parentheses settings remain in effect until parenthesis boundary
\-sampling-factor geometry
horizontal and vertical sampling factor
\-scene value image scene number
\-seed value seed a new sequence of pseudo-random numbers
\-size geometry width and height of image
\-statistic type geometry
replace each pixel with corresponding statistic from the neighborhood
\-stretch type render text with this font stretch
\-stroke color graphic primitive stroke color
\-strokewidth value graphic primitive stroke width
\-style type render text with this font style
\-support factor resize support: > 1.0 is blurry, < 1.0 is sharp
\-synchronize synchronize image to storage device
\-taint declare the image as modified
\-texture filename name of texture to tile onto the image background
\-tile-offset geometry
tile offset
\-treedepth value color tree depth
\-transparent-color color
transparent color
\-undercolor color annotation bounding box color
\-units type the units of image resolution
\-verbose print detailed information about the image
\-virtual-pixel method
virtual pixel access method
\-weight type render text with this font weight
\-white-point point chromaticity white point
\-write-mask filename associate a write mask with the image
Image Operators:
\-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
\-annotate geometry text
annotate the image with text
\-auto-gamma automagically adjust gamma level of image
\-auto-level automagically adjust color levels of image
\-auto-orient automatically orient image
\-auto-threshold method
automatically perform image thresholding
\-bench iterations measure performance
\-bilateral-blur geometry
non-linear, edge-preserving, and noise-reducing smoothing filter
\-black-threshold value
force all pixels below the threshold into black
\-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
\-brightness-contrast geometry
improve brightness / contrast of the image
\-canny geometry detect edges in the image
\-channel mask set the image channel mask
\-charcoal radius simulate a charcoal drawing
\-chop geometry remove pixels from the image interior
\-clahe geometry contrast limited adaptive histogram equalization
\-clamp keep pixel values in range (0-QuantumRange)
\-clip clip along the first path from the 8BIM profile
\-clip-mask filename associate a clip mask with the image
\-clip-path id clip along a named path from the 8BIM profile
\-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
\-color-threshold start_color-stop_color
force all pixels in the color range to white otherwise black
\-connected-component connectivity
connected-components uniquely labeled
\-contrast enhance or reduce the image contrast
\-contrast-stretch geometry
improve contrast by `stretching' the intensity range
\-convolve coefficients
apply a convolution kernel to the image
\-cycle amount cycle the image colormap
\-deskew threshold straighten an image
\-despeckle reduce the speckles within an image
\-distort method args
distort images according to given method and args
\-draw string annotate the image with a graphic primitive
\-edge radius apply a filter to detect edges in the image
\-emboss radius emboss an 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
\-extent geometry set the image size
\-extract geometry extract area from image
\-fft implements the discrete Fourier transform (DFT)
\-flip flip image vertically
\-floodfill geometry color
floodfill the image with color
\-flop flop image horizontally
\-frame geometry surround image with an ornamental border
\-function name apply a function to the image
\-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
\-grayscale method convert image to grayscale
\-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)
\-implode amount implode image pixels about the center
\-integral calculate the sum of values (pixel values) in the image
\-interpolative-resize geometry
resize image using interpolation
\-kmeans geometry K means color reduction
\-lat geometry local adaptive thresholding
\-layers method optimize or compare image layers
\-level value adjust the level of image contrast
\-level-colors color,color
level image with the given colors
\-linear-stretch geometry
improve contrast by `stretching with saturation' the intensity range
\-liquid-rescale geometry
rescale image with seam-carving
\-mean-shift geometry delineate arbitrarily shaped clusters in the image
\-median geometry apply a median filter to the image
\-mode geometry make each pixel the 'predominant color' of the neighborhood
\-modulate value vary the brightness, saturation, and hue
\-monochrome transform image to black and white
\-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 geometry 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
add a noise pattern to the image with specific amplitudes
\-paint radius simulate an oil painting
\-perceptible epsilon
pixel value less than |epsilon| become epsilon or -epsilon
\-polaroid angle simulate a Polaroid picture
\-posterize levels reduce the image to a limited number of color levels
\-print string interpret string and print to console
\-profile filename add, delete, or apply an image profile
\-quantize colorspace reduce colors in this colorspace
\-radial-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
\-range-threshold values
perform either hard or soft thresholding within some range of values in an image
\-region geometry apply options to a portion of the image
\-render render vector graphics
\-resample geometry change the resolution of an image
\-resize geometry resize the image
\-roll geometry roll an image vertically or horizontally
\-rotate degrees apply Paeth rotation to the image
\-sample geometry scale image with pixel sampling
\-scale geometry scale the image
\-segment values segment an image
\-selective-blur geometry
selectively blur pixels within a contrast threshold
\-sepia-tone threshold
simulate a sepia-toned photo
\-set property value set an image property
\-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
\-sigmoidal-contrast geometry
lightness rescaling using sigmoidal contrast enhancement
\-sketch geometry simulate a pencil sketch
\-solarize threshold negate all pixels above the threshold level
\-sort-pixels sort each scanline in ascending order of intensity
\-sparse-color method args
fill in a image based on a few color points
\-splice geometry splice the background color into the image
\-spread amount displace image pixels by a random amount
\-strip strip image of all profiles and comments
\-swirl degrees swirl image pixels about the center
\-threshold value threshold the image
\-thumbnail geometry create a thumbnail of the image
\-tile filename tile image when filling a graphic primitive
\-tint value tint the image with the fill color
\-transform affine transform image
\-transparent color make this color transparent within the image
\-transpose flip image vertically and rotate 90 degrees
\-transverse flop image horizontally and rotate 270 degrees
\-trim trim image edges
\-type type image type
\-unique-colors discard all but one of any pixel color
\-unsharp geometry sharpen the image
\-vignette geometry soften the edges of the image in vignette style
\-wave geometry alter an image along a sine wave
\-wavelet-denoise threshold
removes noise from the image using a wavelet transform
\-white-balance automagically adjust white balance of image
\-white-threshold value
force all pixels above the threshold into white
Image Channel Operators:
\-channel-fx expression
exchange, extract, or transfer one or more image channels
\-separate separate an image channel into a grayscale image
Image Sequence Operators:
\-append append an image sequence top to bottom (use +append for left to right)
\-clut apply a color lookup table to the image
\-coalesce merge a sequence of images
\-combine combine a sequence of images
\-compare mathematically and visually annotate the difference between an image and its reconstruction
\-complex operator perform complex mathematics on an image sequence
\-composite composite image
\-copy geometry offset,
copy pixels from one area of an image to another
\-crop geometry cut out a rectangular region of the image
\-deconstruct break down an image sequence into constituent parts
\-evaluate-sequence operator
evaluate an arithmetic, relational, or logical expression
\-flatten flatten a sequence of images
\-fx expression apply mathematical expression to an image channel(s)
\-hald-clut apply a Hald color lookup table to the image
\-morph value morph an image sequence
\-mosaic create a mosaic from an image sequence
\-poly terms build a polynomial from the image sequence and the corresponding terms (coefficients and degree pairs)
\-process arguments process the image with a custom image filter
\-smush geometry smush an image sequence together
\-write filename write images to this file
Image Stack Operators:
\-clone indexes clone an image
\-delete indexes delete the image from the image sequence
\-duplicate count,indexes
duplicate an image one or more times
\-insert index insert last image into the image sequence
\-reverse reverse image sequence
\-swap indexes swap two images in the image sequence
Miscellaneous Options:
\-debug events display copious debugging information
\-distribute-cache port
distributed pixel cache spanning one or more servers
\-help print program options
\-log format format of debugging information
\-list type print a list of supported option arguments
\-version print version information
Use any setting or operator as an \fIoutput-option\fP. Only a limited number of setting are \fIinput-option\fP. They include: \-antialias, \-caption, \-density, \-define, \-encoding, \-font, \-pointsize, \-size, and \-texture as well as any of the miscellaneous options.
By default, the image format of `file' is determined by its magic number. To specify a particular image format, precede the filename with an image format name and a colon (i.e. ps:image) or specify the image type as the filename suffix (i.e. image.ps). Specify 'file' as '-' for standard input or output.
.SH SEE ALSO
ImageMagick(1)
.SH COPYRIGHT
\fBCopyright (C) 1999 ImageMagick Studio LLC. Additional copyrights and licenses apply to this software, see file:///opt/alt/alt-ImageMagick/usr/share/doc/ImageMagick-7/www/license.html or https://imagemagick.org/script/license.php\fP