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Best way to move a window [message #29532]

Wed, 27 February 2002 18:03

Ned Horning
Messages: 6
Registered: March 2001

Junior Member

I am writing a progarm that move a 3 x 3 window through an image. From
what I can tell IDL isn't well suited for the way I have programmed it
but I can't figure out how to improve it. I expect I'm missing a
fundamental concept.

The way I currently have it writen is to move the window, one pixel at
a time and process it like this:

FOR y=1, num_tile_lines - 2 DO BEGIN
out_tile[y*num_tile_samples] = 0
FOR x=1, num_tile_samples - 2 DO BEGIN
IF (((tile_data[x,y] gt 179.99999) AND (tile_data[x,y] lt
180.0001)) OR $
((tile_data[x+1,y] gt 179.99999) AND (tile_data[x+1,y] lt
180.0001)) OR $
((tile_data[x-1,y] gt 179.99999) AND (tile_data[x-1,y] lt
180.0001)) OR $
((tile_data[x,y+1] gt 179.99999) AND (tile_data[x,y+1] lt
180.0001)) OR $
((tile_data[x,y-1] gt 179.99999) AND (tile_data[x,y-1] lt
180.0001)) OR $
((tile_data[x+1,y+1] gt 179.99999) AND (tile_data[x+1,y+1] lt
180.0001)) OR $
((tile_data[x-1,y-1] gt 179.99999) AND (tile_data[x-1,y-1] lt
180.0001)) OR $
((tile_data[x-1,y+1] gt 179.99999) AND (tile_data[x-1,y+1] lt
180.0001)) OR $
((tile_data[x+1,y-1] gt 179.99999) AND (tile_data[x+1,y-1] lt
180.0001))) THEN $
out_tile[y*num_tile_samples+x] = 0 ELSE BEGIN

Is there a faster way to do this?

Thanks in advance for any advice.

Ned

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[Message index]

		Best way to move a window By: Ned Horning on Wed, 27 February 2002 18:03
		Re: Best way to move a window By: Ned Horning on Fri, 01 March 2002 06:16
		Re: Best way to move a window By: Jaco van Gorkom on Fri, 01 March 2002 04:49

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