Displays an image associative array.

image—An image associative array.

x, y—(optional) The lower-left x- and y-coordinates of the displayed image in the window. (See the TV procedure for more information.)

position—(optional) A number specifying the position of the image. (See the TV procedure for more information.)

Animate—If nonzero, multiple images are displayed sequentially. The Animate keyword only applies if the image associative array contains multiple images.

Delay—A floating-point value determining the frame-to-frame delay in seconds: applies only to animations. (Default: 0.01)

Quiet—Suppresses successive levels of error messages, depending on the set value. This keyword accepts the same integer values used with the system variable !Quiet.

Sub_Img—An integer specifying the index of the subimage in the image associative array to display. (Default: 0)

Window—An integer specifying the window number. (Default: first free window number)

Data—Specifies that the data coordinate system be used by x and y (image position).

Device—Specifies that the device coordinate system be used by x and y (image position). This is the default if no other coordinate-system keyword is specified.

Normal—Specifies that the normal coordinate system be used by x and y (image position).

Wset—If set and the Window keyword is also specified, the image draws into the specified window. If set and the Window keyword is not specified, the image draws into the current active window.

The following keywords are only used if a new window is created; they are ignored if you use Wset and the window exists.

Bitmap—(Windows Only) Specifies that the window being created is actually an invisible portion of the display memory called a bitmap.

Colors—The maximum number of color-table indices to be used.

NoMeta—(Windows Only) Turns metafiles off for the window. This is the default if Animate is specified.

Pixmap—Specifies that the window being created is actually an invisible portion of the display memory called a pixmap.

Retain—Specifies how backing store for the window should be handled. (See the Retain keyword in the WINDOW procedure for more information.)

Title—If specified with a string value, then the string becomes the title of the window. If set, but no string is specified (for example, /Title), then the window title is the COMMENTS field of the image.

XPos—The x position of the lower-left corner of the new window, specified in pixels relative to the lower-left corner of the display.

XSize—The width of the window, in pixels. (Default: width of the image)

YPos—The y position of the lower-left corner of the new window, specified in pixels relative to the lower-left corner of the display.

YSize—The height of the window, in pixels. (Default: height of the image)

The input associative array for the IMAGE_DISPLAY procedure, image, must be created by the routines IMAGE_READ or IMAGE_CREATE.

On systems where the display depth is eight or less (for example, when !D.Display_Depth ≤ 8), 24-bit images are converted to 8-bit pseudo-color before being displayed. This conversion is performed using the IMAGE_COLOR_QUANT function and does not affect the original data. However, 8-bit images may be quantized to fewer colors if there are not enough colors available to display the image. To ensure that enough colors are available, use Colors=256 when creating the first window.

This example shows how an image associative array created with IMAGE_CREATE can be displayed with IMAGE_DISPLAY.

; Assign some pixel data (all zeros).

pixels = BYTARR(100, 200) 

; Assign a colormap (all zeros).

cmap = BYTARR(3, 50)

image = IMAGE_CREATE(pixels, File_name='test.tif', $

   Colormap=cmap, File_type='tif')

; The image is displayed as a black image.

IMAGE_DISPLAY, image

IMAGE_COLOR_QUANT, IMAGE_CREATE, IMAGE_READ, TV, WINDOW, TVSCL,   

System Variables:  !Quiet,   !Order