 Options |
-
Options are processed in command line order. Any option you specify on
the command line remains in effect until it is explicitly changed by specifying
the option again with a different effect.
 -antialias |
-
remove pixel aliasing.
| -append |
-
append a set of images.
-
All the input images must have the same width or height. Images of the
same width are stacked top-to-bottom. Images of the same height are stacked
left-to-right. Use +append to stack rectangular images left-to-right.
| -average |
-
average a set of images.
| -blur
<radius>x<sigma> |
- blur the image with a gaussian operator of the given radius and
standard deviation (sigma).
| -border
<width>x<height> |
-
surround the image with a border of color. See X(1) for details
about the geometry specification.
| -bordercolor
color |
-
the border color.
| -box
color |
-
set the color of the annotation bounding box. See -draw for further
details.
| -cache
threshold |
-
megabytes of memory available to the pixel cache.
-
Image pixels are stored in memory until 80 megabytes of memory have been
consumed. Subsequent pixel operations are cached on disk. Operations to
memory are significantly faster but if your computer does not have a sufficient
amount of free memory you may want to adjust this threshold value.
| -channel
type |
-
the type of channel: Red, Green, Blue, or Matte.
-
Use this option to extract a particular channel from the image.
Matte,
for example, is useful for extracting the opacity values from an image.
| -charcoal
factor |
-
simulate a charcoal drawing.
| -coalesce |
-
merge a sequence of images.
-
See X(1) for details about the color specification.
| -colorize
value |
-
colorize the image with the pen color.
-
Specify the amount of colorization as a percentage. You can apply separate
colorization values to the red, green, and blue channels of the image with
a colorization value list delineated with slashes (e.g. 0/0/50).
| -colors
value |
-
preferred number of colors in the image.
-
The actual number of colors in the image may be less than your request,
but never more. Note, this is a color reduction option. Images with less
unique colors than specified with this option will have any duplicate or
unused colors removed. Refer to quantize for
more details.
Note, options -dither, -colorspace, and -treedepth
affect the color reduction algorithm.
| -colorspace
value |
-
the type of colorspace: GRAY, OHTA, RGB,
Transparent,
XYZ,
YCbCr, YIQ, YPbPr,
YUV, or CMYK.
-
Color reduction, by default, takes place in the RGB color space. Empirical
evidence suggests that distances in color spaces such as YUV or YIQ correspond
to perceptual color differences more closely than do distances in RGB space.
These color spaces may give better results when color reducing an image.
Refer to quantize for more details.
The Transparent color space behaves uniquely in that it preserves
the matte channel of the image if it exists.
The -colors or -monochrome option is required for this
option to take effect.
| -comment
string |
-
annotate an image with a comment.
-
Use this option to assign a specific comment to the image. You can include the
image filename, type, width, height, or other image attribute by embedding
special format characters:
%b file size
%c comment
%d directory
%e filename extention
%f filename
%h height
%i input filename
%l label
%m magick
%n number of scenes
%o output filename
%p page number
%q quantum depth
%s scene number
%t top of filename
%u unique temporary filename
%w width
%x x resolution
%y y resolution
\\n newline
\\r carriage return
For example,
-comment "%m:%f %wx%h"
-
produces an image comment of MIFF:bird.miff 512x480 for an image
titled bird.miff and whose width is 512 and height is 480.
-
If the first character of string is @, the image comment
is read from a file titled by the remaining characters in the string.
| -compress
type |
-
the type of image compression: None, BZip, Fax,
Group4,
JPEG,
LZW, RunlengthEncoded or Zip.
-
Specify +compress to store the binary image in an uncompressed format.
The default is the compression type of the specified image file.
| -contrast |
-
enhance or reduce the image contrast.
-
This option enhances the intensity differences between the lighter and
darker elements of the image. Use -contrast to enhance the image
or +contrast to reduce the image contrast.
| -crop
<width>x<height>{+-}<x
offset>{+-}<y offset>{%} |
-
preferred size and location of the cropped image. See X(1) for details
about the geometry specification.
-
To specify a percentage width or height instead, append %. For example
to crop the image by ten percent on all sides of the image, use -crop
10%.
-
Use cropping to apply image processing options to, or display, a particular
area of an image.
-
Omit the x and y offset to generate one or more subimages of a uniform
size.
-
Use cropping to crop a particular area of an image. Use -crop 0x0
to trim edges that are the background color. Add an x and y offset to leave
a portion of the trimmed edges with the image.
| -cycle
amount |
-
displace image colormap by amount.
-
Amount defines the number of positions each colormap entry is shifted.
| -deconstruct |
-
break down an image sequence into constituent parts.
| -delay
<1/100ths
of a second> |
-
display the next image after pausing.
This option is useful for regulating the animation of GIF images
within Netscape.. 1/100ths of a second must expire before the display
of the next image. The default is no delay between each showing of the
image sequence. The maximum delay is 65535.
You can specify a delay range (e.g. -delay 10-500) which sets the
minimum and maximum delay.
| -density
<width>x<height> |
-
vertical and horizontal resolution in pixels of the image.
-
This option specifies an image density when decoding a PostScript
or Portable Document page. The default is 72 dots per inch in the horizontal
and vertical direction. This option is used in concert with -page.
| -depth
value |
-
depth of the image. This is the number of bits in a pixel. The only acceptable
values are 8 or 16.
| -despeckle |
-
reduce the speckles within an image.
| -display
host:display[.screen] |
-
specifies the X server to contact. This option is used with convert for
obtaining image or font from this X server. see X(1).
| -dispose
method |
-
GIF disposal method.
-
Here are the valid methods:
0 No disposal specified.
1 Do not dispose between frames.
2 Overwrite frame with background color from header.
3 Overwrite with previous frame.
| -dither |
-
apply Floyd/Steinberg error diffusion to the image.
-
The basic strategy of dithering is to trade intensity resolution for spatial
resolution by averaging the intensities of several neighboring pixels.
Images which suffer from severe contouring when reducing colors can be
improved with this option.
-
The -colors or -monochrome option is required for this option
to take effect.
-
Use +dither to render Postscript without text or graphic aliasing.
| -draw
string |
-
annotate an image with one or more graphic primitives.
-
Use this option to annotate an image with one or more graphic primitives.
The primitives include
point
line
rectangle
roundRectangle
arc
ellipse
circle
polyline
polygon
bezier
path
color
matte
text
image
-
Point and line each require a single coordinate.
Line requires a start and end coordinate, while rectangle
expects an upper left and lower right coordinate. roundRectangle
has a center coordinate, a width and height, and the width and height of the
corners. Circle has a center coordinate and a coordinate for the outer
edge. Use Arc to circumscribe an arc within a rectangle. Arcs require
a start and end point as well as the degree of rotation
(e.g. 130,30 200,100 45,90). Use Ellipse to draw a partial ellipse
centered at the given point, with the x-axis and y-axis radius
and start and end of arc in degrees (e.g. 100,100 100,150 0,360).
Finally, polyline and polygon require three or more coordinates
to define its boundaries. Coordinates are integers separated by an
optional comma. For example, to define a circle centered at 100,100
that extends to 150,150 use:
-draw 'circle 100,100 150,150'
- Paths
represent an outline of an object which is defined in terms of
moveto (set a new current point), lineto (draw a straight line),
curveto (draw a curve using a cubic bezier), arc (elliptical or
circular arc) and closepath (close the current shape by drawing a line
to the last moveto) elements. Compound paths (i.e., a path with
subpaths, each consisting of a single moveto followed by one or more
line or curve operations) are possible to allow effects such as "donut
holes" in objects.
-
Use color to change the color of a pixel. Follow the pixel coordinate
with a method:
point
replace
floodfill
filltoborder
reset
-
Consider the target pixel as that specified by your coordinate. The
point
method recolors the target pixel. The replace method recolors any
pixel that matches the color of the target pixel.
Floodfill recolors
any pixel that matches the color of the target pixel and is a neighbor,
whereas filltoborder recolors any neighbor pixel that is not the
border color. Finally, reset recolors all pixels.
-
Use matte to the change the pixel matte value to transparent. Follow
the pixel coordinate with a method (see the color primitive for
a description of methods). The point method changes the matte value
of the target pixel. The replace method changes the matte value
of any pixel that matches the color of the target pixel. Floodfill
changes the matte value of any pixel that matches the color of the target
pixel and is a neighbor, whereas
filltoborder changes the matte
value of any neighbor pixel that is not the border color (-bordercolor).
Finally reset changes the matte value of all pixels.
-
Use text to annotate an image with text. Follow the text coordinates
with a string. If the string has embedded spaces, enclose it in double
quotes. Optionally you can include the image filename, type, width, height,
or other image attribute by embedding special format character. See -comment
for details.
-
For example,
-draw 'text 100,100 "%m:%f %wx%h"'
annotates the image with MIFF:bird.miff 512x480 for an image titled
bird.miff
and whose width is 512 and height is 480. To generate a Unicode character
(TrueType fonts only), embed the code as an escaped hex string (e.g.
\0x30a3).
Use image to composite an image with another image. Follow the
image coordinates with the image size and filename:
-draw 'image 100,100 225,225 image.jpg'
-
If the first character of string is @, the text is read from
a file titled by the remaining characters in the string.
You can set the primitive color, font color, and font bounding box
color with
-fill, -font, and -box respectively. Options
are processed in command line order so be sure to use -fillbefore
the -draw option.
| -edge
order |
-
detect edges within an image.
Good order values are odd numbers from 3 to 31
| -enhance |
-
apply a digital filter to enhance a noisy image.
| -equalize |
-
perform histogram equalization to the image.
| -fill
color |
-
color to use when filling a graphic primitive. See -draw for further
details.
| -filter
type |
-
use this type of filter when resizing an image.
-
Use this option to affect the resizing operation of an image (see
-geometry).
Choose from these filters:
Point
Box
Triangle
Hermite
Hanning
Hamming
Blackman
Gaussian
Quadratic
Cubic
Catrom
Mitchell
Lanczos
Bessel
Sinc
-
The default filter is Lanczos.
| -flip |
-
create a "mirror image" by reflecting the scanlines in the vertical direction.
| -flop |
-
create a "mirror image" by reflecting the image scanlines in the horizontal
direction.
| -font
name |
-
use this font when annotating the image with text.
-
You can tag a font to specify whether it is a Postscript, Truetype, or X11
font. For example, Arial.ttf is a Truetype font, ps:helvetica
is Postscript, and x:fixed is X11.
| -frame
<width>x<height+<outer
bevel width>+<inner bevel width |
-
surround the image with an ornamental border. See
X(1) for details
about the geometry specification.
-
The color of the border is specified with the
-mattecolor command
line option.
| -fuzz
distance |
-
colors within this distance are considered equal.
-
A number of algorithms search for a target color. By default the color
must be exact. Use this option to match colors that are close to the target
color in RGB space. For example, if you want to automatically trim the
edges of an image with -crop 0x0 but the image was scanned. The
target background color may differ by a small amount. This option can account
for these differences.
| -gamma
value |
-
level of gamma correction.
-
The same color image displayed on two different workstations may look different
due to differences in the display monitor. Use gamma correction to adjust
for this color difference. Reasonable values extend from 0.8 to
2.3.
-
You can apply separate gamma values to the red, green, and blue channels
of the image with a gamma value list delineated with slashes (i.e. 1.7,2.3,1.2).
-
Use +gamma to set the image gamma level without actually adjusting
the image pixels. This option is useful if the image is of a known gamma
but not set as an image attribute (e.g. PNG images).
| -gaussian
<radius>x<sigma> |
- blur the image with a gaussian operator of the given radius and
standard deviation (sigma).
| -geometry
<width>x<height>{+-}<x
offset>{+-}<y offset>{%}{!}{<}{>} |
-
preferred size and location of the Image window. See
X(1) for details
about the geometry specification. By default, the window size is the image
size and the location is chosen by you when it is mapped.
-
By default, the width and height are maximum values. That is, the image
is expanded or contracted to fit the width and height value while maintaining
the aspect ratio of the image. Append an exclamation point to the geometry
to force the image size to exactly the size you specify. For example,
if you specify 640x480! the image width is set to 640 pixels and
height to 480. If only one factor is specified, both the width and height
assume the value.
-
To specify a percentage width or height instead, append %. The image size
is multiplied by the width and height percentages to obtain the final image
dimensions. To increase the size of an image, use a value greater than
100 (e.g. 125%). To decrease an image's size, use a percentage less than
100.
Use > to change the dimensions of the image only if
its size exceeds the geometry specification. < resizes the image
only
if its dimensions is less than the geometry specification. For example,
if you specify 640x480> and the image size is 512x512, the image
size does not change. However, if the image is 1024x1024, it is resized
to 640x480.
Use < to change the dimensions of the image only if
its size exceeds the geometry specification. > resizes the image
only
if its dimensions is less than the geometry specification. For example,
if you specify 640x480> and the image size is 512x512, the image
size does not change. However, if the image is 1024x1024, it is resized
to 640x480.
There are 72 pixels per inch in PostScript coordinates.
| -gravity
type |
-
direction text gravitates to when annotating the image: NorthWest, North,
NorthEast, West, Center, East, SouthWest, South, SouthEast. See X(1) for
details about the gravity specification.
-
The direction you choose specifies where to position the text when annotating
the image. For example Center gravity forces the text to be centered
within the image. By default, the image gravity is NorthWest.
| -implode
factor |
-
implode image pixels about the center. Specify factor as the percent
implosion (0 - 99.9%) or explosion (-99.9 - 0%).
| -interlace
type |
-
the type of interlacing scheme: None, Line, Plane,
or Partition. The default is None.
-
This option is used to specify the type of interlacing scheme for raw image
formats such as RGB or YUV. None means do not interlace
(RGBRGBRGBRGBRGBRGB...), Line uses scanline interlacing (RRR...GGG...BBB...RRR...GGG...BBB...),
and Plane uses plane interlacing (RRRRRR...GGGGGG...BBBBBB...).
Partition
is like plane except the different planes are saved to individual files
(e.g. image.R, image.G, and image.B).
-
Use Line, or Plane to create an interlaced GIF or
progressive
JPEG image.
| -label
name |
-
assign a label to an image.
-
Use this option to assign a specific label to the image. Optionally you
can include the image filename, type, width, height, or other image attribute
by embedding special format character. See -comment for details.
-
For example,
-label "%m:%f %wx%h"
-
produces an image label of MIFF:bird.miff 512x480 for an image titled
bird.miff
and whose width is 512 and height is 480.
-
If the first character of string is @, the image label is
read from a file titled by the remaining characters in the string.
-
When converting to PostScript, use this option to specify a header
string to print above the image. Specify the label font with
-font.
| -loop
iterations |
-
add Netscape loop extension to your GIF animation.
-
A value other than zero forces the animation to repeat itself up to
iterations
times.
| -map
filename |
-
choose a particular set of colors from this image.
-
By default, color reduction chooses an optimal set of colors that best
represent the original image. Alternatively, you can choose a particular
set of colors from an image file with this option. Use
+map to reduce
all images provided on the command line to a single optimal set of colors
that best represent all the images.
| -matte |
-
store matte channel if the image has one otherwise create an opaque one.
| -modulate
value |
-
vary the brightness, saturation, and hue of an image.
-
Specify the percent change in brightness, the color saturation, and the
hue separated by commas. For example, to increase the color brightness
by 20% and decrease the color saturation by 10% and leave the hue unchanged,
use: -modulate 120,90.
| -median
order |
-
apply a median filter to the image.
Good order values are odd numbers from 3 to 31
| -monochrome |
-
transform the image to black and white.
| -morph
frames |
-
morphs an image sequence.
-
Both the image pixels and size are linearly interpolated to give the appearance
of a meta-morphosis from one image to the next.
| -mosaic |
-
create an mosaic from an image sequence.
| -negate |
-
replace every pixel with its complementary color (white becomes black,
yellow becomes blue, etc.).
-
The red, green, and blue intensities of an image are negated. Use +negate
to only negate the grayscale pixels of the image.
| -noise value |
-
add or reduce noise in an image.
-
The principal function of noise peak elimination filter is to smooth the
objects within an image without losing edge information and without creating
undesired structures. The central idea of the algorithm is to replace a
pixel with its next neighbor in value within a pixel window, if this pixel
has been found to be noise. A pixel is defined as noise if and only if
this pixel is a maximum or minimum within the pixel window.
Use \fIorder\fP to specify the width of the neighborhood.
-
Use +noise followed by a noise type to add noise to an image. Choose
from these noise types:
Uniform
Gaussian
Multiplicative
Impulse
Laplacian
Poisson
| -normalize |
-
transform image to span the full range of color values.
-
This is a contrast enhancement technique.
| -opaque
color |
-
change this color to the pen color within the image.
-
See -fill for more details.
| -page
<width>x<height>{+-}<x
offset>{+-}<y offset>{%}{!}{<}{>} |
-
size and location of an image canvas.
-
Use this option to specify the dimensions of the
PostScript page
in dots per inch or a TEXT page in pixels. The choices for a Postscript
page are:
11x17 792 1224
Ledger 1224 792
Legal 612 1008
Letter 612 792
LetterSmall 612 792
ArchE 2592 3456
ArchD 1728 2592
ArchC 1296 1728
ArchB 864 1296
ArchA 648 864
A0 2380 3368
A1 1684 2380
A2 1190 1684
A3 842 1190
A4 595 842
A4Small 595 842
A5 421 595
A6 297 421
A7 210 297
A8 148 210
A9 105 148
A10 74 105
B0 2836 4008
B1 2004 2836
B2 1418 2004
B3 1002 1418
B4 709 1002
B5 501 709
C0 2600 3677
C1 1837 2600
C2 1298 1837
C3 918 1298
C4 649 918
C5 459 649
C6 323 459
Flsa 612 936
Flse 612 936
HalfLetter 396 612
-
For convenience you can specify the page size by media (e.g. A4, Ledger,
etc.). Otherwise, -page behaves much like
-geometry (e.g.
-page
letter+43+43>).
-
To position a GIF image, use -page{+-}<x offset>{+-}<y
offset> (e.g. -page "+1"00+200).
-
For a Postscript page, the image is sized as in -geometry and positioned
relative to the lower left hand corner of the page by {+-}<xoffset>{+-}<y
offset>. Use
-page 612x792>, for example, to center the
image within the page. If the image size exceeds the Postscript page, it
is reduced to fit the page.
-
The default page dimensions for a TEXT image is 612x792.
-
This option is used in concert with -density.
| -paint
radius |
-
simulate an oil painting.
-
Each pixel is replaced by the most frequent color in a circular neighborhood
whose width is specified with radius.
| -pointsize
value |
-
pointsize of the Postscript, X11, or TrueType font.
| -preview
type |
-
image preview type.
-
Use this option to affect the preview operation of an image (e.g.
convert
-preview Gamma Preview:gamma.png). Choose from these previews:
Rotate
Shear
Roll
Hue
Saturation
Brightness
Gamma
Spiff
Dull
Grayscale
Quantize
Despeckle
ReduceNoise
Add Noise
Sharpen
Blur
Threshold
EdgeDetect
Spread
Shade
Raise
Segment
Solarize
Swirl
Implode
Wave
OilPaint
CharcoalDrawing
JPEG
-
The default preview is JPEG.
| -profile
filename |
-
add ICM color or IPTC newswire information profile to image.
-
Use +profile icm or +profile iptc to remove the respective
profile.
| -quality
value |
-
JPEG/MIFF/PNG compression level.
-
For the JPEG image format, quality is 0 (worst) to 100 (best). The default
quality is 75.
-
Quality for the MIFF and PNG image format sets the amount of image compression
(quality / 10) and filter-type (quality % 10). Compression quality values
range from 0 (worst) to 100 (best). If filter-type is 4 or less, the specified
filter-type is used for all scanlines:
0: none
1: sub
2: up
3: average
4: Paeth
-
If filter-type is 5, adaptive filtering is used when quality is greater
than 50 and the image does not have a color map, otherwise no filtering
is used.
-
If filter-type is 6 or more, adaptive filtering with minimum-sum-of-absolute-values
is used.
-
The default is quality is 75. Which means nearly the best compression with
adaptive filtering.
-
For further information, see the PNG
specification.
| -raise
<width>x<height> |
-
lighten or darken image edges to create a 3-D effect. See X(1) for
details about the geometry specification.
-
Use -raise to create a raised effect, otherwise use +raise.
| -region
<width>x<height>{+-}<x
offset>{+-}<y offset> |
-
apply options to a portion of the image.
-
By default, any command line options are applied to the entire image. Use
-region
to restrict operations to a particular area of the image.
| -roll
{+-}<x offset>{+-}<y offset> |
-
roll an image vertically or horizontally. See X(1) for details about
the geometry specification.
-
A negative x offset rolls the image left-to-right. A negative y
offset rolls the image top-to-bottom.
| -rotate
degrees{<}{>} |
-
apply Paeth image rotation to the image.
-
Use > to rotate the image only if its width exceeds the height.
< rotates the image only if its width is less than the
height. For example, if you specify -90> and the image size is
480x640, the image is not rotated by the specified angle. However, if the
image is 640x480, it is rotated by -90 degrees.
-
Empty triangles left over from rotating the image are filled with the color
defined as bordercolor (class
borderColor). See X(1)
for details.
| -sample
geometry |
-
scale image with pixel sampling. See -geometry for details about
the geometry specification.
| -scene
value |
-
image scene number.
| -seed
value |
-
pseudo-random number generator seed value.
| -segment
<cluster
threshold>x<smoothing threshold> |
-
segment an image by analyzing the histograms of the color components and
identifying units that are homogeneous with the fuzzy c-means technique.
-
Specify cluster threshold as the number of pixels in each cluster
must exceed the the cluster threshold to be considered valid. Smoothing
threshold eliminates noise in the second derivative of the histogram.
As the value is increased, you can expect a smoother second derivative.
The default is 1.5. See Image Segmentation for details.
| -shade
<azimuth>x<elevation> |
-
shade the image using a distant light source.
-
Specify azimuth and elevation as the position of the light
source. Use +shade to return the shading results as a grayscale
image. image.
| -sharpen
<radius>x<sigma> |
- sharpen the image with a gaussian operator of the given radius and
standard deviation (sigma).
| -shear
<x degrees>x<y degrees> |
-
shear the image along the X or Y axis by a positive or negative shear angle.
-
Shearing slides one edge of an image along the X or Y axis, creating a
parallelogram. An X direction shear slides an edge along the X axis, while
a Y direction shear slides an edge along the Y axis. The amount of the
shear is controlled by a shear angle. For X direction shears, x degrees
is measured relative to the Y axis, and similarly, for Y direction shears
y
degrees is measured relative to the X axis.
-
Empty triangles left over from shearing the image are filled with the color
defined as bordercolor (class
borderColor). See X(1)
for details.
| -size
<width>x<height>{+offset} |
-
width and height of the image.
-
Use this option to specify the width and height of raw images whose dimensions
are unknown such as GRAY,
RGB, or CMYK. In addition
to width and height, use
-size to skip any header information in
the image or tell the number of colors in a MAP image file, (e.g.
-size 640x512+256).
-
For Photo CD images, choose from these sizes:
192x128
384x256
768x512
1536x1024
3072x2048
-
Finally, use this option to choose a particular resolution layer of a JBIG
or JPEG image (e.g. -size 1024x768).
| -solarize
factor |
-
negate all pixels above the threshold level. Specify factor as the
percent threshold of the intensity (0 - 99.9%).
-
This option produces a solarization effect seen when exposing a
photographic film to light during the development process.
| -spread
amount |
-
displace image pixels by a random amount.
-
Amount defines the size of the neighborhood around each pixel to
choose a candidate pixel to swap.
| -stroke
color |
-
color to use when stroking a graphic primitive. See -draw for further
details.
| -strokewidth
value |
-
set the stroke width. See -draw for further details.
| -swirl
degrees |
-
swirl image pixels about the center.
-
Degrees defines the tightness of the swirl.
| -transparent
color |
-
make this color transparent within the image.
| -texture
filename |
-
name of texture to tile onto the image background.
| -threshold
value |
-
threshold the image.
-
Create a bi-level image such that any pixel intensity that is equal or
exceeds the threshold is reassigned the maximum intensity otherwise the
minimum intensity.
| -tile
filename |
- tile image when filling a graphic primitive.
| -treedepth
value |
-
Normally, this integer value is zero or one. A zero or one tells display
to choose an optimal tree depth for the color reduction algorithm.
-
An optimal depth generally allows the best representation of the source
image with the fastest computational speed and the least amount of memory.
However, the default depth is inappropriate for some images. To assure
the best representation, try values between 2 and 8 for this parameter.
Refer to
quantize for more details.
-
The -colors or -monochrome option is required for this option
to take effect.
| -type
type |
-
the image type:
Bilevel, Grayscale, Palette,
PaletteMatte, TrueColor, TrueColorMatte,
or ColorSeparation.
| -units
type |
-
the type of image resolution: Undefined, PixelsPerInch, or
PixelsPerCentimeter.
| -verbose |
-
print detailed information about the image.
-
This information is printed: image scene number; image name; image size;
the image class (DirectClass or PseudoClass); the total number
of unique colors; and the number of seconds to read and transform the image.
Refer to miff for a description of the image class.
-
If -colors is also specified, the total unique colors in the image
and color reduction error values are printed. Refer to quantize
for a description of these values.
| -view
string |
-
FlashPix viewing paramters.
| -wave
<amplitude>x<wavelength> |
-
alter an image along a sine wave.
-
Specify amplitude and wavelength to effect the characteristics
of the wave.
-
By default, the image format is determined by its magic number. To specify
a particular image format, precede the filename with an image format name
and a colon (i.e.ps:image) or specify the image type as the
filename suffix
When you specify X as your image type, the filename has special
meaning. It specifies an X window by id, name, or
root. If
no filename is specified, the window is selected by clicking the mouse
in the desired window.
Specify input_file as - for standard input,
output_file
as - for standard output. If input_file has the extension .Z
or
.gz, the file is uncompressed with uncompress or gunzip
respectively. If output_file has the extension .Z or
.gz,
the file size is compressed using with compress or gzip respectively.
Finally, precede the image file name with | to pipe to or from a system
command.
Use an optional index enclosed in brackets after a file name to specify
a desired subimage of a multi-resolution image format like Photo CD (e.g.
img0001.pcd[4]) or a range for MPEG images (e.g. video.mpg[50-75]). A subimage
specification can be disjoint (e.g. image.tiff[2,7,4]). For raw images,
specify a subimage with a geometry (e.g. -size 640x512 image.rgb[320x256+50+50]).
Single images are written with the filename you specify. However, multi-part
images (i.e. a multi-page PostScript document with +adjoin specified)
are written with the filename followed by a period (.) and the scene
number. You can change this behavior by embedding a printf format
specification in the file name. For example,
-
image%02d.miff
converts files image00.miff, image01.miff, etc.
Prepend an at sign @ to a filename to read a list of image
filenames from that file. This is convenient in the event you have too
many image filenames to fit on the command line.
AVS - AVS X image file.
Image manipulation software that works like magic.