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image subtraction [message #29786] Wed, 13 March 2002 13:39
aburden is currently offline  aburden
Messages: 1
Registered: March 2002
Junior Member
Hi,

Can anyone come up with an efficient way to subtract a single image
from an array of images without using a loop, as in

imgArr = imgArr - img1

where,

imgArr = lonarr(12,512,512)

and,

img1 = lonarr(512,512)

as opposed to

For ii=0,11 do imgArr[ii,*,*] = imgArr[ii,*,*] - img1

Thanks for any suggestions.

Art

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