###### RMagick 2.13.1 User's Guide and Reference

# RMagick: Magick Command Options and Their Equivalent Methods

## convert, mogrify

### Introduction

If you're familiar with the ImageMagick command-line tools `convert`, `mogrify`, `composite`, and `montage` you can use the tables on this page to determine which RMagick methods correspond to the options used by these tools.

The options listed below are for ImageMagick 6.5.5. Earlier releases of ImageMagick may not support all these options. Later releases of ImageMagick may have options that are not listed.

ImageMagick's `convert` and `mogrify` share many options with each other, as well as with the other utilities. This table includes all the options for both `convert` and `mogrify`. When another utility has an option with the same name and purpose, and same RMagick equivalent, the option is omitted from the table for that utility.

Magick Option | RMagick Method
--- | ---
-adaptive-blur radiusxsigma | Image#adaptive_blur(radius=0.0, sigma=1.0)
-adaptive-resize widthxheight | Image#adaptive_resize(width, height)
-adaptive-sharpen radiusxsigma | Image#adaptive_sharpen(radius=0.0, sigma=1.0)
-adjoin | No equivalent. All images in an imagelist are written to the same file if the file format supports multi-image files.
-affine sx, rx, ry, sy, tx, ty | Draw#affine(sx, rx, ry, sy, tx, ty) (for drawing) Draw#affine=matrix (for annotation)
-alpha type | Image#alpha=type
-annotate x-rotatexy-rotate+x+y text | Draw#annotate(image, width, height, x, y, text)
-antialias | Draw#stroke_antialias(`true`) Draw#text_antialias(`true`) (for drawing) Draw#text_antialias=`true` (for annotation)
-append +append | ImageList#append(`true`) ImageList#append(`false`)
-attenuate value | Image::Info#attenuate=value
-authenticate string | Image::Info#authenticate=string
-auto-gamma | Image#auto_gamma_channel([channel...])
-auto-level | Image#auto_level_channel([channel...])
-auto-orient | Image#auto-orient
-average | ImageList#average
-backdrop color | No equivalent
-background color | Image::Info#background_color=color
-bench | No equivalent
-bias value[%] | Image#bias(value) Image#bias('value%')
-black-point-compensation | Image#black_point_compensation= `true`
-black-threshold threshold | Image#black_threshold(red_channel [, green_channel [, blue_channel [, opacity_channel]]])
-blend src-percentxdst-percent | Image#blend(overlay, src_percent, dst_percent, x_offset=0, y_offset=0)
-blue-primary x,y | Image#chromaticity= chromaticity
-blue-shift factor | Image#blue_shift(factor)
-blur radiusxsigma | Image#blur_image(radius=0.0, sigma=1.0)
-border widthxheight | Image#border(width, height, color)
-bordercolor color | Image#border_color=color
-borderwidth geometry | No equivalent
-cache threshold | See -limit, below
-caption string | Image::Info#caption=string
-cdl filename | No equivalent
-channel type | Image::Info#channel(type [, type...]) Channel value arguments are accepted by many methods.
-charcoal factor | Image#charcoal(radius=0.0, sigma=1.0)
-chop widthxheight+x+y | Image#chop(x, y, width, height)
-clip | No equivalent
-clip-mask | Image#mask(image)
-clip-path | No equivalent
-clone | Image#clone Image#copy Image#dup
-clut | Image#clut_channel(clut_image [, channel...])
-coalesce | ImageList#coalesce
-colorize value | Image#colorize(red, green, blue, [matte, ] fill)
-colormap type | No equivalent
-colors | This option corresponds to the first argument to Image#quantize and ImageList#quantize.
-colorspace colorspace | Image#colorspace=colorspace Also corresponds to the colorspace argument to Image#quantize and ImageList#quantize
-combine | Image.combine(red, green, blue, opacity)
-comment string | Image#['Comment']=string
-compose operator | This option corresponds to the composite_op argument to Image#composite.
-compose Mathematics -set option:compose:args a,b,c,d | Image#composite_mathematics(source_image, a, b, c, d, gravity, x, y)
-composite | Image#composite(source_image, gravity, x, y, composite_op)
-compress type | Image#compression=type
-contrast +contrast | Image#contrast(`true`) Image#contrast(`false`)
-contrast-stretch black-pointxwhite-point | Image#contrast_stretch_channel( black_point, white_point [, channel...])
-convolve kernel | Image#convolve(order, kernel)
-crop widthxheight+x+y | Image#crop(x, y, width, height)
-cycle amount | Image#cycle_colormap(amount)
-debug | Magick.set_log_event_mask
-decipher | Image#decipher(passphrase)
-deconstruct | ImageList#deconstruct
-define key=value +define key | Image::Info#define(format, key, value) Image::Info#undefine(format, key)
-delay ticksxticks-per-second | Image#ticks=ticks Image#ticks_per_second= ticks-per-second
-delete index | ImageList#delete_at(index)
-density widthxheight | Image#density="widthxheight" Image::Info#density="widthxheight" Image#x_resolution=width Image#y_resolution=height
-depth depth | Image::Info#depth=depth
-descend | No equivalent
-deskew threshold | Image#deskew(threshold=0.40, auto_crop_width)
-despeckle | Image#despeckle
-displace | See -displace, below
-display | No equivalent
-dispose method | Image#dispose=method
-dissimilarity-threshold value | No equivalent
-dissolve | See -dissolve, below
-distort method arguments +distort method arguments | Image#distort(method, arguments, bestfit)
-dither +dither | This option corresponds to the dither option to Image#quantize and ImageList#quantize.
-draw string | Draw#draw
-edge radius | Image#edge(radius=0.0)
-emboss radius | Image#emboss(radius=0.0, sigma=1.0)
-encipher | Image#encipher(passphrase)
-encoding type | Draw#encoding(type) (for drawing) Draw#encoding=type (for annotation)
-endian type | Image::Info#endian=type
-enhance | Image#enhance
-equalize | Image#equalize Image#equalize_channel
-evaluate operator value | Image#quantum_operator(operator, value [, channel])
-extent widthxheight | Image#extent(width, height, x=0, y=0)
-extract widthxheight+x+y | Image::Info.extract="widthxheight+ x+y"
-family font_family | Draw#font_family(font_family) (for drawing) Draw#font_family=font_family (for annotation)
-fft | No equivalent
-fill color | Draw#fill(color) (for drawing) Draw#fill=color (for annotation)
-filter type | This option corresponds to the filter option to Image#resize.
-flatten | ImageList#flatten_images
-flip | Image#flip
-floodfill geometry color | Image#color_floodfill(x, y, color)
-flop | Image#flop
-font name | Draw#font(name) (for drawing) Draw#font=name (for annotation)
-foreground color | No equivalent
-format type | Image#format=type
-frame widthxheight+outer-bevel-width+ inner-bevel-width | Image#frame(width, height, x, y, inner_bevel_width, outer_bevel_width, color)
-function function arguments | Image#function_channel(function, arguments)
-fuzz distance -fuzz distance% | Image#fuzz=distance Image#fuzz="distance%"
-fx expression | ImageList#fx(expression)
-gamma red_gamma,green_gamma,blue_gamma | Image#gamma_correct(red_gamma[, green_gamma[, blue_gamma]])
-gaussian-blur radiusxsigma | Image#gaussian_blur(radius=0.0, sigma=1.0) Image#gaussian_blur_channel( radius=0.0, sigma=1.0 [, channel...])
-geometry widthxheight+x+y | Image#geometry="widthx height+x+y"
-gravity type | Draw#gravity(type) (for drawing) Draw#gravity= type (for annotation)
-green-primary x,y | Image#chromaticity= chromaticity
-hald-clut | No equivalent
-help | No equivalent
-highlight-color color | Image#compare_channel(ref_image, metric[, channels...]) { self.highlight_color color}
-iconGeometry | No equivalent
-iconic | No equivalent
-identify | Image#inspect
-ift | No equivalent
-immutable | Image#freeze
-implode factor | Image#implode(factor)
-insert index | ImageList#insert(index) ImageList#[index]
-intent type | Image#rendering_intent= type
-interlace type | Image#interlace=type
-interpolate type | Image#pixel_interpolation_method= type
-interline-spacing value | Draw#interline_spacing(value) (for drawing) Draw#interline_spacing=value (for annotation)
-interword-spacing value | Draw#interword_spacing(value) (for drawing) Draw#interword_spacing=value (for annotation)
-kerning value | Draw#kerning(value) (for drawing) Draw#kerning=value (for annotation)
-label name | Image#['Label']=name
-lat widthxheight+offset | Image#adaptive_threshold( width, height, offset)
-layers method -layers Composite | ImageList#optimize_layers(method) ImageList#composite_layers(imagelist, operator=OverCompositeOp)
-level black-point,white-point,gamma | Image#level_channel(channel, black_point=0.0, white_point=QuantumRange, gamma=1.0)
+level black_point,white_point,gamma | Image#levelize_channel(black_point, white_point, gamma=1.0[, channels...])
-level-colors black_color-white_color | Image#level_colors(black_color, white_color, gamma=1.0[, channels...])
-limit type value | Magick.limit_resource(type, value)
-linear-stretch black-pointxwhite-point | Image#linear_stretch(black_point [, white_point])
-linewidth width | Draw#stroke_width(width) (for drawing) Draw#stroke_width=width (for annotation)
-liquid-rescale geometry | Image#liquid_rescale(new_width, new_height, delta_x, rigidity)
-list color -list format -list type | Magick.colors Magick.formats Magick.fonts
-log string | Magick.set_log_format
-loop iterations | ImageList#iterations=iterations
-lowlight-color color | Image#compare_channel(ref_image, metric[, channels...]) { self.lowlight_color color}
-magnify | Image#magnify
-map filename | Image#map(reference, dither=`false`) ImageList#map(reference, dither=`false`)
-mask filename | Image#add_composite_mask(image)
-mattecolor color | This option corresponds to the color option to Image#frame.
-median radius | Image#median_filter(radius=1.0)
-metric type | This option corresponds to the metric option to Image#distortion_channel.
-mode | No equivalent
-modulate value | Image#modulate(brightness=1.0, saturation=1.0, hue=1.0)
-monitor | Image#monitor=
-monochrome | Image#image_type= Magick::BilevelType
-morph frames | ImageList#morph(frames)
-mosaic | ImageList#mosaic
-motion-blur radiusxsigma+angle | Image#motion_blur(radius=0.0, sigma=1.0, angle=0.0)
-name | No equivalent
-negate +negate | Image#negate Image#negate(`true`)
-noise radius +noise type | Image#reduce_noise(radius) Image#add_noise( type)
-normalize | Image#normalize Image#normalize_channel
-opaque color +opaque color | Image#opaque(color, fill) Image#opaque_channel(color, fill, opacity, true)
-ordered-dither NxN | Image#ordered_dither(N)
-orient orientation | Image#orientation=orientation
-page widthxheight+x+y -page media | Image::Info.page="widthxheight+ x+y" Image::Info.page="media"
-paint radius | Image#oil_paint(radius=3.0)
-path path | No equivalent
-pause | No equivalent
-ping | Image.ping(filename)
-pointsize value | Draw.pointsize(value) (for drawing) Draw.pointsize=value (for annotation)
-polaroid angle | Image.polaroid(angle=-5.0)
-posterize levels | Image#posterize(levels=4, dither=`false`)
-preview type | Image#preview(type)
-print | No equivalent
-process command | No equivalent
-profile filename +profile name | Image#add_profile(filename) Image#delete_profile(name)
-quality value | Image::Info#quality=value
-quantize colorspace | Image#quantize(number_colors=256, colorspace=RGBColorspace, dither=`true`, tree_depth=0, measure_error=`false`) ImageList#quantize(number_colors=256, colorspace=RGBColorspace, dither=`true`, tree_depth=0, measure_error=`false`)
-quiet | No equivalent
-radial-blur angle | Image#radial_blur(angle)
-raise widthxheight +raise widthxheight | Image#raise(width, height, `true`) Image#raise(width, height, `false`)
-random-threshold lowxhigh | Image#random_threshold_channel(" lowxhigh" [, channel...])
-recolor matrix | Image#recolor(matrix)
-red-primary x,y | Image#chromaticity= chromaticity
-regard-warnings | No equivalent
-region widthxheight+x+y | No equivalent
-remap +remap | Image#remap(remap_image, dither=RiemersmaDitherMethod) ImageList#remap()
-remote | No equivalent
-render | No equivalent
-repage geometry +repage | Image#page=geometry This option corresponds to adding `true` as the last argument to Image#crop.
-resample horizontalxvertical | Image#resample(horizontal, vertical)
-resize widthxheight | Image#resize(width, height)
-respect-parenthesis | No equivalent
-reverse | ImageList#reverse
-roll +x+y | Image#roll(x, y)
-rotate degrees | Image#rotate(degrees [, qualifier])
-sample widthxheight | Image#sample(width, height)
-sampling-factor horizontal-factorxvertical-factor | Image::Info#sampling_factor=horizontal-factorx vertical-factor
-scale widthxheight | Image#scale(width, height)
-scene value | ImageList#scene= value Image::Info#scene= value
-screen | No equivalent
-seed | Kernel.srand
-segment cluster-thresholdxsmoothing-threshold | Image#segment(colorspace= `RGBColorspace`, cluster_threshold=1.0, smoothing_threshold=1.5, verbose=false)
-selective-blur geometry | Image#selective_blur(radius, sigma, threshold [, channel...])
-separate | Image#separate(channel...])
-sepia-tone threshold | Image#sepiatone(threshold=QuantumRange)
-set attribute value | Image#['attribute'] = value
-shade azimuthxelevation | Image#shade(shading=`false`, azimuth=30, elevation=30)
-shadow opacityxsigma+x+y | Image#shadow(x=4, y=4, sigma=4.0, opacity=4.0)
-shared-memory | No equivalent
-sharpen radiusxsigma | Image#sharpen(radius=0.0, sigma=1.0)
-shave widthxheight | Image#shave(width, height)
-shear x-degreesxy-degrees | Image#shear(x_degrees, y_degrees)
-sigmoidal-contrast contrastxmid-point | Image#sigmoidal_contrast_channel( contrast=3.0, mid_point=50.0, sharpen=`false` [, channel...])
-silent | No equivalent
-size widthxheight+offset | Image::Info#size="widthxheight+ offset"
-sketch radiusxsigma+angle | Image#sketch(radius=0.0, sigma=1.0, angle=0.0)
-snaps | No equivalent
-solarize threshold | Image#solarize(threshold=50)
-sparse-color method, x, y, color... | Image#sparse_color(method, x, y, color[, x, y, color...][, channel...])
-splice widthxheight+x+y | Image#splice(x, y, width, height [, color])
-spread amount | Image#spread(amount=3)
-stegano offset | Image#stegano(watermark, offset)
-stereo | Image#stereo(offset_image)
-storage-type type | This option corresponds to the type argument to Image#import_pixels and Image#export_pixels_to_str
-stretch font_stretch | Draw#font_stretch(font_stretch) (for drawing) Draw#font_stretch=font_stretch (for annotation)
-strip | Image#strip!
-stroke color | Draw#stroke(color) (for drawing) Draw#stroke=color (for annotation)
-strokewidth value | Draw#stroke_width(value) (for drawing) Draw#stroke_width=value (for annotation)
-style font_style | Draw#font_style(font_style) (for drawing) Draw#font_style=font_style (for annotation)
-swap index,index | ImageList#[]=
-swirl degrees | Image#swirl(degrees)
-taint | No equivalent
-text-font | No equivalent
-texture filename | Image::Info#texture=image
-threshold value | Image#bilevel_channel(value [, channel...])
-thumbnail widthxheight | Image#thumbnail(width, height)
-tile filename | Draw#tile(image)
-tile-offset +x+y | Image::Info#tile_offset = "+x+y"
-tint | No equivalent
-title | No equivalent
-transform | Image#affine_transform( matrix)
-transparent color +transparent color | Image#transparent(color, opacity=TransparentOpacity) Image#paint_transparent(color, opacity, true)
-transparent-color color | Image#transparent_color= color
-transpose | Image#transpose
-transverse | Image#transverse
-treedepth value | This option corresponds to the tree_depth argument to Image#quantize and ImageList#quantize.
-trim | Image#trim
-type type | Image#type=type
-undercolor color | Draw#text_undercolor(color) Draw#undercolor=color
-unique-colors | Image#unique_colors
-units type | Image#units=type
-unsharp radiusxsigma+amount+threshold | Image#unsharp_mask(radius=0.0, sigma=1.0, amount=1.0, threshold=0.05)
-update | No equivalent
-verbose | No equivalent
-version | Magick::Long_version
-view string | Image::Info#view=string
-vignette radiusxsigma+amount+threshold | Image#vignette(x, y, radius=0.0, sigma=10.0)
-virtual-pixel method | Image#virtual_pixel_method= method
-visual | No equivalent
-watermark brightness | See watermark, below
-wave amplitudexwavelength | Image#wave(amplitude=25.0, wavelength=150.0)
-weight type | Draw#font_weight(type) (for drawing) Draw#font_weight=type
-white-point x.y | Image#chromaticity= chromaticity
-white-threshold threshold | Image#white_threshold(red_channel [, green_channel[, blue_channel[, opacity_channel]]])
-window id | No equivalent
-window-group | No equivalent
-write filename | Image#write(filename) ImageList#write(filename)

## composite

Magick Option | RMagick Method
--- | ---
-blend src-percentxdst-percent | Image#blend(overlay, src_percent, dst_percent, x_offset=0, y_offset=0)
-displace x-amplitudexy-amplitude | Image#displace(displacement_map, x_amplitude, y_amplitude, x_offset=0, y_offset=0)
-dissolve src_percentxdst_percent | Image#dissolve(overlay, src_percent, dst_percent, x_offset=0,y_offset=0)
-tile | Image#composite_tiled(src, composite_op=OverCompositeOp)
-watermark lightness | Image#watermark(mark, lightness=1.0, saturation=1.0, x_offset=0, y_offset=0)

## montage

### Notes

The RMagick methods that correspond to `montage`'s options are in the `Magick::ImageList::Montage` class.

Magick Option | RMagick Method
--- | ---
-backgroundcolor color | Montage#background_color=color
-bordercolor color | Montage#border_color=color
-borderwidth value | Montage#border_width=value
-clone | No equivalent
-compose operator | Montage#compose=operator
-fill color | Montage#fill=color
-frame geometry | Montage#frame="geometry"
-geometry geometry | Montage#geometry="geometry"
-gravity type | Montage#gravity=type
-mattecolor color | Montage#matte_color=color
-mode type | No equivalent
-pointsize value | Montage#pointsize=value
-shadow | Montage#shadow=`true`
-stroke color | Montage#stroke=color
-texture filename | Montage#texture=image
-tile geometry | Montage#tile=geometry
-title string | Montage#title=string