SAS Component Language Dictionary

IMGOP

Performs image operations

Category:

Image

Syntax
Commands Used with IMGOP

Syntax

rc=IMGOP(task-id,command,<other arguments>);

rc

contains the return code for the operation:

0	successful
>0	not successful

Type: Numeric

task-id

contains the identifier (returned by a previous IMGINIT function) of the task to be operated upon.

Type: Numeric

command

is the command to execute. Valid commands are listed in Commands Used with IMGOP.

Type: Character

other-arguments

lists arguments that are used for a command. The arguments required for a command may include image file attributes. You can specify image file attributes by enclosing the attributes in quotation marks and separating multiple attributes with blanks. For example:

rc=imgop(tid,"WRITE",filename,
           "FORMAT=TIFF
           COMPRESS=G3FAX"):

Type: Character or Numeric

Note: When read with IMGOP, Encapsulated Postscript Interchange (EPSI) files display as low-resolution and monochrome. This degraded image is the preview version of the actual image. [cautionend]

Commands Used with IMGOP

For detailed information about these commands, see Commands Used with the IMGCTRL, IMGOP and PICFILL Functions.

CONVERT: converts an image to the specified image type and depth.
COPY: copies an image.
CREATE_IMAGE: creates a new image that is stored in memory.
CROP: crops the selected image.
DESTROY: removes an image from memory and from the display.
DESTROY_ALL: removes all images from memory and from the display.
DITHER: dithers an image to a color map.
DITHER_BW: dithers the selected image to a monochrome black and white image.
EXECLIST: executes a list of commands.
FILTER: applies a filter to an image.
GAMMA: applies a gamma value to the selected image.
GENERATE_CMAP: generates a color map for the selected image.
GET_BARCODE: returns the value of the specified bar code.
GET_COLORS: returns the RGB values of the index positions of a color map for the selected image.
GET_PIXEL: returns the pixel value of a specified position in the selected image.
GRAB_CMAP: grabs the color map from the selected image.
MAP_COLORS: maps colors to the closest color in the selected color map.
MIRROR: mirrors an image.
NEGATE: changes the image to a negative.
PASTE: displays an image at a specified location.
PASTE_AUTO: displays an image automatically.
PRINT: prints an image.
QUANTIZE: reduces the number of colors used for an image.
QUERYC, QUERYL, and QUERYN: query information about images.
READ: reads an image from an external file, a SAS catalog, or a device.
READ_CLIPBOARD: reads an image from the host clipboard.
READ_PASTE: reads and displays an image.
READ_PASTE_AUTO: reads and automatically displays an image.
ROTATE: rotates an image clockwise by 90, 180, or 270 degrees.
SCALE: scales an image.
SELECT: selects the image identifier to be used in other commands.
SET_COLORS: assigns the RGB values for the index positions of a color map for the current image.
SET_PIXEL: assigns the pixel value in an image at the specified position.
STANDARD_CMAP: selects a color map.
THRESHOLD: converts color images to black and white, using the value that is specified with the THRESHOLD command.
TILE: replicates the current image into a new image.
UNPASTE: removes an image from the display.
WRITE: writes an image to a file or to a SAS catalog.
WRITE_CLIPBOARD: writes an image to the host clipboard.

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