Используйте программу convert для конвертирования в разные форматы изображений, а также изменения размеров, затемнения, обрезки, удаления пятен, сглаживания, рисования на них, поворота (на угол), объединения, изменения размера и многого другого! Посмотрите советы по использованию, чтобы понять как написать нужные параметры для своих нужд. Также вы найдете там некоторые результаты использования утилиты.

Программа поставляется в пакете утилит от ImageMagick: этот чудесный пакет

Примеры запуска

Вот список из нескольких примеров конвертирования, который показывает насколько полезна и легка в использовании утилита. Давайте для начала сконвертируем изображение из JPEG в формат PNG:

$ convert rose.jpg rose.png

Теперь, мы уменьшим размер изображения перед тем, как записать его в формате PNG:

$ convert rose.jpg -resize 50% rose.png

rose.jpg


Вы можете комбинировать параметры обработки для получения смешанного результата:

$ convert -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

Обзор параметров

Утилита поддерживает эти опции. Нажмите на каждую, чтобы получить более развернутую информацию.

Опция Описание
-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
-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
-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
-clamp restrict colors from 0 to the quantum depth
-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
-contrast-stretch geometry improve the contrast in an image by `stretching' the range of intensity value
-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
-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
-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 value 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
-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 an arithmetic, relational, or logical 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. contract, correlations, etc.).
-fft implments 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
-green-primary point chromaticity green primary point
-help print program options
-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
-insert index insert last image into the image sequence
-intent type type of rendering intent when managing the image color
-interlace type type of image interlacing scheme
-interline-spacing value the space between two text lines
-interpolate method pixel color interpolation method
-interword-spacing value the space between two words
-kerning value the space between two characters
-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
-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
-mode radius make each pixel the 'predominant color' of the neighborhood
-modulate value vary the brightness, saturation, and hue
-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 (setting)
-paint radius simulate an oil painting
-ping efficiently determine image attributes
-pointsize value font point size
-polaroid angle simulate a Polaroid picture
-posterize levels reduce the image to a limited number of color levels
-precision value set the maximum number of significant digits to be 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
-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
-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 the resolution of an 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
-sigmoidal-contrast geometry increase the 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
-splice geometry splice the background color into the image
-spread radius displace image pixels by a random amount
-statistic type geometry replace each pixel with corresponding statistic from the 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 the vertical direction and rotate 90 degrees
-transverse flop image in the 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 the boundaries of the image
-wave geometry alter an image along a sine wave
-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
-write filename write images to this file

Ссылки