DISSOLVE

The DISSOLVE procedure provides a digital “dissolve” effect for images. The routine copies pixels from the image (arranged into square tiles) to the display in pseudo-random order. This routine is written in the IDL language. Its source code can be found in the file dissolve.pro in the lib subdirectory of the IDL distribution.

Examples

Read in and display an image using a 10 x 10 pixel size:

fir = FILEPATH('africavlc.png', SUBDIR=['examples', 'data'])

READ_PNG, fir, firi

DISSOLVE, firi, DELAY=0.001, SIZ=10

Syntax

DISSOLVE, Image [, DELAY=seconds] [, /ORDER] [, SIZ=pixels] [, X0=pixels] [, Y0=pixels]

Arguments

Image

The image to be displayed. It is assumed that the image is already scaled. Byte-valued images display most rapidly.

Keywords

DELAY

The wait between displaying tiles. The default is 0.01 second.

ORDER

The Image display order: 0 = bottom up (the default), 1 = top-down.

SIZ

Size of square tile. The default is 32 x 32 pixels.

X0

The X offset of the lower-left corner of the image on screen, in pixels.

Y0

The Y offset of the lower-left corner of the image on screen, in pixels.

Version History

Pre 4.0

Introduced