mogrify(1)                                                          mogrify(1)

       mogrify - mogrify an image

       mogrify [ options ... ] file ...

       Mogrify  transforms  an image or a sequence of images. These transforms
       include image scaling, image rotation, color reduction, and others. The
       transmogrified  image  overwrites  the original image, unless an option
       such as -format causes the output filename to  be  different  from  the
       input filename.

       The graphics formats supported by mogrify are listed in ImageMagick(1).

       To convert all the TIFF files in a particular directory to JPEG, use:

           mogrify -format jpeg *.tiff

       To convert a directory full of JPEG images to thumbnails, use:

           convert -size 120x120 *.jpg -resize 120x120 +profile '*'

       In this example, "-i size 120x120" gives a hint  to  the  JPEG  decoder
       that  the  images are going to be downscaled to 120x120, allowing it to
       run faster by avoiding returning full-resolution images.  The  "-resize
       120x120"  specifies  the  desired  dimensions of the output images.  It
       will be scaled so its largest dimension is 120 pixels.   The  "+profile
       '*'"  removes  any  ICM,  EXIF,  IPTC,  or other profiles that might be
       present in the input and aren't needed in the thumbnails.

       To scale an image of a cockatoo to exactly 640 pixels in width and  480
       pixels in height, use:

           mogrify -resize 640x480! cockatoo.miff

       Options  are processed in command line order. Any option you specify on
       the command line remains in effect for the set of images that  follows,
       until the set is terminated by the appearance of any option or -noop.

       For a more detailed description of each option, see ImageMagick(1).

       -affine <matrix>
              drawing transform matrix

              remove pixel aliasing

       -background <color>
              the background color

       -blur <radius>x<sigma>
              blur the image with a gaussian operator

       -border <width>x<height>
              surround the image with a border of color

       -bordercolor <color>
              the border color

       -cache <threshold>
              megabytes of memory available to the pixel cache

       -channel <type>
              the type of channel

       -charcoal <factor>
              simulate a charcoal drawing

       -colorize <value>
              colorize the image with the pen color

       -colors <value>
              preferred number of colors in the image

       -colorspace <value>
              the type of colorspace

       -comment <string>
              annotate an image with a comment

       -compress <type>
              the type of image compression

              enhance or reduce the image contrast

       -crop <width>x<height>{+-}<x>{+-}<y>{%}
              preferred size and location of the cropped image

       -cycle <amount>
              displace image colormap by amount

       -debug enable debug printout

       -delay <1/100ths of a second>
              display the next image after pausing

       -density <width>x<height>
              vertical and horizontal resolution in pixels of the image

       -depth <value>
              depth of the image

              reduce the speckles within an image

       -display <host:display[.screen]>
              specifies the X server to contact

       -dispose <method>
              GIF disposal method

              apply Floyd/Steinberg error diffusion to the image

       -draw <string>
              annotate an image with one or more graphic primitives

       -edge <radius>
              detect edges within an image

              emboss an image

       -encoding <type>
              specify the font encoding

       -endian <type>
              specify endianness (MSB or LSB) of output image

              apply a digital filter to enhance a noisy image

              perform histogram equalization to the image

       -fill <color>
              color to use when filling a graphic primitive

       -filter <type>
              use this type of filter when resizing an image

       -flip  create a "mirror image"

       -flop  create a "mirror image"

       -font <name>
              use this font when annotating the image with text

       -format <type>
              the image format type

       -frame <width>x<height>+<outer bevel width>+<inner bevel width>
              surround the image with an ornamental border

       -fuzz <distance>{%}
              colors within this distance are considered equal

       -gamma <value>
              level of gamma correction

       -gaussian <radius>x<sigma>
              blur the image with a gaussian operator

       -geometry <width>x<height>{+-}<x>{+-}<y>{%}{@} {!}{<}{>}
              preferred size and location of the Image window.

       -gravity <type>
              direction primitive  gravitates to when annotating the image.

       -help  print usage instructions

       -implode <factor>
              implode image pixels about the center

       -interlace <type>
              the type of interlacing scheme

       -label <name>
              assign a label to an image

       -level <value>
              adjust the level of image contrast

              the line width for subsequent draw operations

       -list <type>
              the type of list

       -loop <iterations>
              add Netscape loop extension to your GIF animation

       -map <filename>
              choose a particular set of colors from this image

       -mask <filename>
              Specify a clipping mask

       -matte store matte channel if the image has one

       -mattecolor <color>
              specify the matte color

       -median <radius>
              apply a median filter to the image

       -modulate <value>
              vary the brightness, saturation, and hue of an image

              transform the image to black and white

              replace every pixel with its complementary color

       -noise <radius|type>
              add or reduce noise in an image

       -noop  NOOP (no option)

              transform image to span the full range of color values

       -opaque <color>
              change this color to the pen color within the image

       -page <width>x<height>{+-}<x>{+-}<y>{%}{!}{<}{>}
              size and location of an image canvas

       -paint <radius>
              simulate an oil painting

       -pen <color>
              specify the pen color for drawing operations

       -pointsize <value>
              pointsize of the Postscript, OPTION1, or TrueType font

       -profile <filename>
              add ICM, IPTC, or generic profile  to image

       -quality <value>
              JPEG/MIFF/PNG compression level

       -raise <width>x<height>
              lighten or darken image edges

       -region <width>x<height>{+-}<x>{+-}<y>
              apply options to a portion of the image

       -resize <width>x<height>{%}{@}{!}{<}{>}
              resize an image

       -roll {+-}<x>{+-}<y>
              roll an image vertically or horizontally

       -rotate <degrees>{<}{>}
              apply Paeth image rotation to the image

       -sample <geometry>
              scale image with pixel sampling

       -sampling_factor <horizontal_factor>x<vertical_factor>
              sampling  factors  used  by  JPEG  or  MPEG-2  encoder  and  YUV

       -scale <geometry>
              scale the image.

       -scene <value>
              set scene number

       -seed <value>
              pseudo-random number generator seed value

       -segment <cluster threshold>x<smoothing threshold>
              segment an image

       -shade <azimuth>x<elevation>
              shade the image using a distant light source

       -sharpen <radius>x<sigma>
              sharpen the image

       -shave <width>x<height>
              shave pixels from the image edges

       -shear <x degrees>x<y degrees>
              shear the image along the X or Y axis

       -size <width>x<height>{+offset}
              width and height of the image

       -solarize <factor>
              negate all pixels above the threshold level

       -spread <amount>
              displace image pixels by a random amount

       -stroke <color>
              color to use when stroking a graphic primitive

       -strokewidth <value>
              set the stroke width

       -swirl <degrees>
              swirl image pixels about the center

       -texture <filename>
              name of texture to tile onto the image background

       -threshold <value>
              threshold the image

       -tile <filename>
              tile image when filling a graphic primitive

              transform the image

       -transparent <color>
              make this color transparent within the image

       -treedepth <value>
              tree depth for the color reduction algorithm

       -trim  trim an image

       -type <type>
              the image type

       -units <type>
              the type of image resolution

       -unsharp <radius>x<sigma>
              sharpen the image with an unsharp mask operator

              print detailed information about the image

       -view <string>
              FlashPix viewing parameters

       -wave <amplitude>x<wavelength>
              alter an image along a sine wave

              For a more detailed description of each  option,  see  ImageMag-

       Use  -segment  to  segment  an image by analyzing the histograms of the
       color components and identifying units that are  homogeneous  with  the
       fuzzy c-means technique. The scale-space filter analyzes the histograms
       of the three color components of the image  and  identifies  a  set  of
       classes.   The  extents  of  each class is used to coarsely segment the
       image with thresholding.  The  color  associated  with  each  class  is
       determined by the mean color of all pixels within the extents of a par-
       ticular class. Finally, any unclassified pixels  are  assigned  to  the
       closest class with the fuzzy c-means technique.

       The fuzzy c-Means algorithm can be summarized as follows:

       Build a histogram, one for each color component of the image.

       For each histogram, successively apply the scale-space filter and build
       an interval tree of zero crossings in the  second  derivative  at  each
       scale.  Analyze this scale-space "fingerprint" to determine which peaks
       or valleys in the histogram are most predominant.

       The fingerprint defines intervals on the axis of  the  histogram.  Each
       interval  contains  either a minima or a maxima in the original signal.
       If each color component lies within the maxima interval, that pixel  is
       considered "classified" and is assigned an unique class number.

       Any pixel that fails to be classified in the above thresholding pass is
       classified using the fuzzy c-Means technique. It is assigned to one  of
       the classes discovered in the histogram analysis phase.

       The  fuzzy c-Means technique attempts to cluster a pixel by finding the
       local minima of the generalized  within  group  sum  of  squared  error
       objective  function.  A pixel is assigned to the closest class of which
       the fuzzy membership has a maximum value.

       For additional information see: <bq>Young Won Lim, Sang  Uk  Lee,  ``On
       The  Color  Image  Segmentation Algorithm Based on the Thresholding and
       the Fuzzy c-Means Techniques'', Pattern Recognition, Volume 23,  Number
       9, pages 935-952, 1990.</bq>

              To get the default host, display number, and screen.

       display(1),  animate(1), identify(1), montage(1), convert(1), ImageMag-
       ick(1), composite(1)

       Copyright (C) 2002 ImageMagick Studio

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       ick"), to deal in ImageMagick without  restriction,  including  without
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       The above copyright notice and this permission notice shall be included
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        John Cristy, ImageMagick Studio LLC,
       Glenn Randers-Pehrson, ImageMagick Studio LLC.

ImageMagick                Date: 2002/02/15 01:00:00                mogrify(1)