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Re: inverse gradient [message #63975]

Wed, 26 November 2008 07:16

pgrigis
Messages: 436
Registered: September 2007

Senior Member

erano wrote:
> Hello all,
>
> I'm looking for a IDL function doing inverse gradient for 2D array.
> inputs should be :
> 2D array gradient for X
> 2D array gradient for Y
> output: the inverse gradient array

"inverse" meaning what for a vector-field?

Paolo

> Can anyone help me?
>
> Eran

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Re: inverse gradient [message #64092 is a reply to message #63975]

Thu, 27 November 2008 00:27

erano
Messages: 22
Registered: November 2008

Junior Member

>
> "inverse" meaning what for a vector-field?
>
> Paolo
>

"inverse" is the opposite operation for gradient.
The inputs are 2D gradient images (dX and dY), where high values are
large changes in the "inverse gradient" image, and zeros are stable
(no changes) in the "inverse gradient".

Eran

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