display

display

NAME SYNOPSIS DESCRIPTION EXAMPLES OPTIONS MOUSE BUTTONS COMMAND WIDGET KEYBOARD ACCELERATORS X RESOURCES IMAGE LOADING VISUAL IMAGE DIRECTORY IMAGE CUTTING IMAGE COPYING IMAGE PASTING IMAGE CROPPING IMAGE CHOPPING IMAGE ROTATION IMAGE SEGMENTATION IMAGE ANNOTATION IMAGE COMPOSITING COLOR EDITING MATTE EDITING IMAGE DRAWING REGION OF INTEREST IMAGE PANNING USER PREFERENCES ENVIRONMENT ACKNOWLEDGEMENTS SEE ALSO COPYRIGHT AUTHORS

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NAME

display - display an image on any workstation running X

SYNOPSIS

display [__ ''options'' __...? file [__''options''__...?file

DESCRIPTION

Display is a machine architecture independent image processing and display program. It can display an image on any workstation screen running an X server. Display can read and write many of the more popular image formats (e.g. JPEG, TIFF, PNM, Photo CD, etc.).

With display, you can perform these functions on an image:

• load an image from a file o display the next image o

display the former image o display a sequence of images as a slide show o write the image to a file o print the image to a !PostScript printer o delete the image file o create a Visual Image Directory o select the image to display by its thumbnail rather than name o undo last image transformation o copy a region of the image o paste a region to the image o restore the image to its original size o refresh the image o half the image size o double the image size o resize the image o crop the image o cut the image o flop image in the horizontal direction o flip image in the vertical direction o rotate the image 90 degrees clockwise o rotate the image 90 degrees counter-clockwise o rotate the image o shear the image o roll the image o trim the image edges o invert the colors of the image o vary the color brightness o vary the color saturation o vary the image hue

• gamma correct the image o sharpen the image contrast o

dull the image contrast o perform histogram equalization on the image o perform histogram normalization on the image o negate the image colors o convert the image to grayscale o set the maximum number of unique colors in the image o reduce the speckles within an image o eliminate peak noise from an image o detect edges within the image o emboss an image o segment the image by color o simulate an oil painting o simulate a charcoal drawing o annotate the image with text o draw on the image o edit an image pixel color o edit the image matte information o composite an image with another o add a border to the image o surround image with an ornamental border o apply image processing techniques to a region of interest o display information about the image o zoom a portion of the image o show a histogram of the image

• display image to background of a window o set user

preferences o display information about this program o discard all images and exit program o change the level of magnification o display images specified by a World Wide Web (WWW) uniform resource locator (URL)

EXAMPLES

To scale an image of a cockatoo to exactly 640 pixels in width and 480 pixels in height and position the window at location (200,200), use:

display -geometry 640x480+200+200! cockatoo.miff

To display an image of a cockatoo without a border centered on a backdrop, use:

display +borderwidth -backdrop cockatoo.miff

To tile a slate texture onto the root window, use:

display -size 1280x1024 -window root slate.png

To display a visual image directory of all your JPEG images, use:

display 'vid:*.jpg'

To display a MAP image that is 640 pixels in width and 480 pixels in height with 256 colors, use:

display -size 640x480+256 cockatoo.map

To display an image of a cockatoo specified with a World Wide Web (WWW) uniform resource locator (URL), use:

display ftp://wizards.dupont.com/images/cockatoo.jpg

To display histogram of an image, use:

convert file.jpg HISTOGRAM:- | display -

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. For example to display three images, the first with 32 colors, the second with an unlimited number of colors, and the third with only 16 colors, use:

display -colors 32 cockatoo.miff -noop duck.miff -colors 16 macaw.miff

Display options can appear on the command line or in your X resources file. See X(1). Options on the command line supersede values specified in your X resources file.

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

-backdrop

display the image centered on a backdrop.

-background

the background color

-border

surround the image with a border of color

-bordercolor

the border color

-borderwidth

the border width

-cache

megabytes of memory available to the pixel cache

-colormap

define the colormap type

-colors

preferred number of colors in the image

-colorspace

the type of colorspace

-comment

annotate an image with a comment

-compress

the type of image compression

-contrast

enhance or reduce the image contrast

-crop

preferred size and location of the cropped image

-debug

enable debug printout

-delay

display the next image after pausing

-density

vertical and horizontal resolution in pixels of the image

-depth

depth of the image

-despeckle

reduce the speckles within an image

-display

specifies the X server to contact

-dispose

GIF disposal method

-dither

apply Floyd/Steinberg error diffusion to the image

-edge

detect edges within an image

-endian

specify endianness (MSB or LSB) of output image

-enhance

apply a digital filter to enhance a noisy image

-filter

use this type of filter when resizing an image

-flip

create a

-flop

create a

-font

use this font when annotating the image with text

-foreground

define the foreground color

-frame

surround the image with an ornamental border

-gamma

level of gamma correction

-geometry

preferred size and location of the Image window.

-help

print usage instructions

-iconGeometry

specify the icon geometry

-iconic

iconic animation

-immutable

make image immutable

-interlace

the type of interlacing scheme

-label

assign a label to an image

-magnify

magnify the image

-map

display image using this type.

-matte

store matte channel if the image has one

-mattecolor

specify the matte color

-monochrome

transform the image to black and white

-name

name an image

-negate

replace every pixel with its complementary color

-noop

NOOP (no option)

-page

size and location of an image canvas

-quality

JPEG/MIFF/PNG compression level

-raise

lighten or darken image edges

-remote

perform a remote operation

-roll {+-}

roll an image vertically or horizontally

-rotate

apply Paeth image rotation to the image

-sample

scale image with pixel sampling

-sampling_factor

sampling factors used by JPEG encoder.

-scenes

range of image scene numbers to read

-segment

segment an image

-shared_memory

use shared memory

-sharpen

sharpen the image

-size

width and height of the image

-text_font

font for writing fixed-width text

-texture

name of texture to tile onto the image background

-title

assign title to displayed image

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