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Re: Image thresholding [message #15379 is a reply to message #15378]

Mon, 17 May 1999 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

David Brennan (9147261b@clinmed.gla.ac.uk) writes:

> Does anyone know of a fast routine or function for searching through a
> 3D data set and setting numbers within a predetermined range of values
> to zero. i.e,
>
> the range is 5 - 10
>
> A data set contains [0,1,2,3,4,5,6,7,8,9]. It becomes
> [0,1,2,3,4,0,0,0,0,0]
>
> This would save me a lot of time.

a = [0,1,2,3,4,5,6,7,8,9]
b = a
b[Where(a ge 5 AND a LT 10)] = 0
Print, b
0,1,2,3,4,0,0,0,0,0

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

[Note: This follow-up was e-mailed to the cited author.]

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		Re: Image thresholding By: David Kastrup on Mon, 17 May 1999 00:00
		Re: Image thresholding By: davidf on Mon, 17 May 1999 00:00
		Re: Image thresholding By: David Kastrup on Mon, 17 May 1999 00:00

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