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 #48747]

Fri, 19 May 2006 09:11

David Streutker
Messages: 34
Registered: June 2005

Member

Is your mask made up of zeros and ones? If so, you are dividing by
zero in all of the masked pixels, causing the error. Because you are
already masking the numerator (partA), it's redundant to mask the
denominator (partB). Try using:

partA = (b1*coef[0,1] - b0*coef[0,0])*mask
partB = b1*coef[0,1] + b0*coef[0,0]

Alternatively, you could apply the mask to the NDVI image itself.

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: Mon Dec 01 07:03:08 PST 2025

Total time taken to generate the page: 0.24118 seconds