comp.lang.idl-pvwave archive: archive » Re: Image division causes Floating illegal operand

Home » Public Forums » archive » Re: Image division causes Floating illegal operand

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Image division causes Floating illegal operand [message #48764 is a reply to message #48747]

Thu, 18 May 2006 11:13

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Paul Van Delst wrote:
> elsueniero@gmail.com wrote:
>
>> Hello,
>>
>> I am writing a small program to calculate NDVI from MODIS images. I
>> got a mask of the valid pixels (no clouds or water) and two calibration
>> coefficients. The code is
>>
>> partA = (b1*coef[0,1] - b0*coef[0,0])*mask
>> partB = (b1*coef[0,1] + b0*coef[0,0])*mask
>>
>> ndviimg = partA / partB
>
>
> Won't this always be 1.0 ?? :o)

Oops... didn't notice the +/-.

ehem.

--
Paul van Delst Ride lots.
CIMSS @ NOAA/NCEP/EMC Eddy Merckx
Ph: (301)763-8000 x7748
Fax:(301)763-8545

Report message to a moderator

[Message index]

		Re: Image division causes Floating illegal operand By: David Streutker on Fri, 19 May 2006 09:11
		Re: Image division causes Floating illegal operand By: Paul Van Delst[1] on Thu, 18 May 2006 11:13
		Re: Image division causes Floating illegal operand By: Paul Van Delst[1] on Thu, 18 May 2006 11:13

Previous Topic:	Re: plot GRIB2 data as an image
Next Topic:	Histogram saga

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 07:21:17 PDT 2025

Total time taken to generate the page: 1.49017 seconds