지각생 연습장


  • Usage: convert [options ...] file [ [options ...] file ...] [options ...] file

사용 예

  • 모든 bmp 을 png로 바꾸기
for bmp in *.bmp; do convert $bmp ${bmp%%.bmp}.png; done
  • 그림을 세로로 붙이기
convert -append `ls *.jpg` output.jpg
  • 그림 크기 바꾸기
for img in *.png; do convert -resize 640x480 $img $img; done


  • Where options include:
 -adjoin              join images into a single multi-image file
 -affine matrix       affine transform matrix
 -annotate geometry text
                      annotate the image with text
 -antialias           remove pixel-aliasing
 -append              append an image sequence
 -authenticate value  decrypt image with this password
 -average             average an image sequence
 -background color    background color
 -bias value          add bias when convolving an image
 -black-threshold value
                      forces all pixels below the threshold into black
 -blue-primary point  chromaticity blue primary point
 -blur geometry       blur the image
 -border geometry     surround image with a border of color
 -bordercolor color   border color
 -channel type        apply option to select image channels
 -charcoal radius     simulate a charcoal drawing
 -chop geometry       remove pixels from the image interior
 -clip                clip along the first path from the 8BIM profile
 -clip-path id        clip along a named path from the 8BIM profile
 -clone index         clone an image
 -coalesce            merge a sequence of images
 -colorize value      colorize the image with the fill color
 -colors value        preferred number of colors in the image
 -colorspace type     alternate 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       type of pixel compression when writing the image
 -contrast            enhance or reduce the image contrast
 -convolve coefficients
                      apply a convolution kernel to the image
 -crop geometry       cut out a rectangular region of the image
 -cycle amount        cycle the image colormap
 -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
 -display server      get image or font from this X server
 -dispose method      GIF disposal method
 -dither              apply Floyd/Steinberg error diffusion to image
 -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
 -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
 -extent geometry     set the image size
 -extract geometry    extract area from image
 -family name         render text with this font family
 -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
 -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 geometry   gaussian blur an image
 -geometry geometry   perferred size or location of the image
 -green-primary point chromaticity green primary point
 -gravity type        horizontal and vertical text placement
 -help                print program options
 -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
 -label name          assign a label to an image
 -lat geometry        local adaptive thresholding
 -level value         adjust the level of image contrast
 -limit type value    pixel cache resource limit
 -log format          format of debugging information
 -loop iterations     add Netscape loop extension to your GIF animation
 -map filename        transform image colors to match this set of colors
 -mask filename       set the image clip mask
 -matte               store matte channel if the image has one
 -mattecolor color    frame color
 -median radius       apply a median filter to the image
 -modulate value      vary the brightness, saturation, and hue
 -monitor             monitor progress
 -monochrome          transform image to black and white
 -morph value         morph an image sequence
 -mosaic              create a mosaic from an image sequence
 -motion-blur geometry
                      simulate motion blur
 -negate              replace every 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
 -posterize levels    reduce the image to a limited number of color levels
 -preview type        image preview type
 -profile filename    add, delete, or apply an image profile
 -quality value       JPEG/MIFF/PNG compression level
 -quiet               suppress all error or 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
 -region geometry     apply options to a portion of the image
 -raise value         lighten/darken image edges to create a 3-D effect
 -red-primary point   chromaticity red primary point
 -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
 -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          pseudo-random number generator seed value
 -segment values      segment an image
 -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
 -sigmodial-contrast geometry
                      lightness rescaling using sigmoidal contrast enhancement
 -size geometry       width and height of image
 -solarize threshold  negate all pixels above the threshold level
 -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
 -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
 -support factor      resize support: > 1.0 is blurry, < 1.0 is sharp
 -swap indexes        swap two images in the image sequence
 -swirl degrees       swirl image pixels about the center
 -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
 -tint value          tint the image with the fill color
 -transform           affine transform image
 -transparent color   make this color transparent within the image
 -treedepth value     color tree depth
 -trim                trim image edges
 -type type           image type
 -undercolor color    annotation bounding box 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
 -virtual-pixel method
                      virtual pixel access method
 -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
                      forces all pixels above the threshold into white
 -write filename      write images to this file
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