  -adjoin              join images into a single multi-image file
  -blur factor         apply a filter to blur the image
  -border geometry     surround image with a border of color
  -box color           color for annotation bounding box
  -colors value        preferred number of colors in the image
  -colorspace type     GRAY, OHTA, RGB, XYZ, YCbCr, YIQ, YPbPr, or YUV
  -comment string      annotate image with comment
  -compress type       RunlengthEncoded or Zip
  -contrast            enhance or reduce the image contrast
  -crop geometry       preferred size and location of the cropped image
  -delay value         display the next image after pausing
  -density geometry    vertical and horizontal density of the image
  -despeckle           reduce the speckles within an image
  -display server      obtain 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 factor         apply a filter to detect edges in the image
  -emboss              emboss an image
  -enhance             apply a digital filter to enhance a noisy image
  -equalize            perform histogram equalization to an image
  -flip                flip image in the vertical direction
  -flop                flop image in the horizontal direction
  -font name           X11 font for displaying text
  -frame geometry      surround image with an ornamental border
  -gamma value         level of gamma correction
  -geometry geometry   perferred size or location of the image
  -implode amount      implode image pixels about the center
  -interlace type      NONE, LINE, or PLANE
  -label name          assign a label to an image
  -loop iterations     add Netscape loop extension to your GIF animation
  -map filename        transform image colors to match this set of colors
  -matte               store matte channel if the image has one
  -modulate value      vary the brightness, saturation, and hue
  -monochrome          transform image to black and white
  -negate              apply color inversion to image
  -noise               reduce noise with a noise peak elimination filter
  -normalize           transform image to span the full range of colors
  -opaque color        change this color to the pen color
  -page geometry       size and location of the Postscript page
  -paint radius        paint an image
  -pen color           color for annotating or changing opaque color
  -pointsize value     pointsize of Postscript font
  -quality value       JPEG quality setting
  -raise value         lighten/darken image edges to create a 3-D effect
  -region geometry     apply options to a portion of 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
  -scene value         image scene number
  -segment value       segment an image
  -sharpen factor      apply a filter to sharpen the image
  -shear geometry      slide one edge of the image along the X or Y axis
  -size geometry       width and height of image
  -solarize thresold   negate all pixels above the threshold level
  -spread amount       displace image pixels by a random amount
  -swirl degrees       swirl image pixels about the center
  -texture filename    name of texture to tile onto the image background
  -transparent color   make this color transparent within the image
  -treedepth value     depth of the color classification tree
  -undercolor geometry control undercolor removal and black generation
  -verbose             print detailed information about the image

  AVS                   AVS X image file.
  BMP   		Microsoft Windows bitmap image file.
  CMYK  		Raw cyan, magenta, yellow, and black bytes.
  DCX   		ZSoft IBM PC multi-page Paintbrush file
  DIB   		Microsoft Windows bitmap image file.
  EPS   		Adobe Encapsulated PostScript file.
  EPS2  		Adobe Level II Encapsulated PostScript file.
  EPSF  		Adobe Encapsulated PostScript file.
  EPSI  		Adobe Encapsulated PostScript Interchange format.
  FAX   		Group 3.
  FITS  		Flexible Image Transport System.
  GIF   		CompuServe graphics interchange format; 8-bit color.
  GIF87 		CompuServe graphics interchange format; 8-bit color (version 87a).
  GRAY  		Raw gray bytes.
  HDF   	        Hierarchical Data Format.
  HISTOGRAM
  HTML  		Hypertext Markup Language with a client-side image map
  JBIG  		Joint Bi-level Image experts Group file interchange format.
  JPEG  		Joint Photographic Experts Group JFIF format; compressed 24-bit color.
  MAP   		colormap intensities and indices.
  MATTE 		Raw matte bytes.
  MIFF  		Magick image file format.
  MPEG  		Motion Picture Experts Group file interchange format.
  MTV
  NULL  		NULL image.
  PBM   		Portable bitmap format (black and white).
  PCD   		Photo CD.
  PCX   		ZSoft IBM PC Paintbrush file.
  PDF   		Portable Document Format.
  PGM   		Portable graymap format (gray scale).
  PICT  		Apple Macintosh QuickDraw/PICT file.
  PNG   		Portable Network Graphics.
  PNM   		Portable anymap.
  PPM   		Portable pixmap format (color).
  PS    		Adobe PostScript file.
  PS2   		Adobe Level II PostScript file.
  RAD   		Radiance image file.
  RGB   		Raw red, green, and blue bytes.
  RGBA  		Raw red, green, blue, and matte bytes.
  RLA   		Alias/Wavefront image file; read only.
  RLE   		Utah Run length encoded image file; read only.
  SGI   		Irix RGB image file.
  SUN   		SUN Rasterfile.
  TEXT  		raw text file; read only.
  TGA   		Truevision Targa image file.
  TIFF  		Tagged Image File Format.
  UYVY  		16bit/pixel interleaved YUV.
  TILE  		tile image with a texture.
  VICAR 		read only.
  VID   		Visual Image Directory.
  VIFF  		Khoros Visualization image file.
  X     		select image from X server screen.
  XC    		constant image of X server color.
  XBM   		X Windows system bitmap, black and white only.
  XPM   		X Windows system pixmap file (color).
  XWD   		X Windows system window dump file (color).
  YUV   		CCIR 601 1:1:1 file.
  YUV3  		CCIR 601 2:1:1 files.
