Option |
Description |
–adaptive-sharpen geometry |
adaptively sharpen pixels; increase effect near edges |
-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 |
force 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 |
image compression type |
-contrast |
enhance or reduce the image contrast |
–contrast-stretch geometry |
improve the contrast in an image by `stretching' the range of intensity value |
-convolve coefficients |
apply a convolution kernel to the image |
-crop geometry |
preferred size and location of the cropped 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 type |
image format type |
-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 |
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 |
-label name |
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 |
-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 |
-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 |
–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 |
-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 |
-red-primary point |
chromaticity red primary point |
-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 |
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 |
-sigmoidal-contrast contrastxmid-point |
image 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 |
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 |