| Option |
Description |
| -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 |
activate, deactivate, reset, or set the alpha channel |
| -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 |
| -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 |
| -blur geometry |
reduce image noise and reduce detail levels |
| -border geometry |
surround image with a border of color |
| -bordercolor color |
border color |
| -caption string |
assign a caption to an image |
| -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-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 |
| -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 |
| -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 |
layer disposal method |
| -distort type coefficients |
distort image |
| -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 |
| -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 |
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 |
| -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 |
| -interpolate method |
pixel color interpolation method |
| -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 |
| -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 |
associate a mask with the image |
| -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 |
| -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 |
| -polaroid angle |
simulate a Polaroid picture |
| -posterize levels |
reduce the image to a limited number of color levels |
| -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 |
| -recolor matrix |
translate, scale, shear, or rotate image colors. |
| -red-primary point |
chromaticity red primary point |
| -regard-warnings |
pay attention to warning messages. |
| -region geometry |
apply options to a portion of the image |
| -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 |
seed a new sequence of pseudo-random numbers |
| -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 |
| -sigmoidal-contrast geometry |
image lightness rescaling using sigmoidal contrast enhancement |
| -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 |
| -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 |
| -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 |