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Re: inverse gradient [message #64085 is a reply to message #63980]

Thu, 27 November 2008 06:24

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On Nov 27, 3:27 am, erano <eran.o...@gmail.com> wrote:
>> "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

I would never use this in production code, but here's a hack that will
give you something to look at:

scalarfield = total(dX, /cumulative, 1) + total(dY, /cumulative, 2)

The real solution is to replace those totals with actual integrals.

-Jeremy.

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[Message index]

		inverse gradient By: erano on Wed, 26 November 2008 02:10
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 10:59
		Re: inverse gradient By: erano on Tue, 02 December 2008 11:42
		Re: inverse gradient By: erano on Tue, 02 December 2008 10:50
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 09:20
		Re: inverse gradient By: erano on Tue, 02 December 2008 09:04
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 07:45
		Re: inverse gradient By: erano on Tue, 02 December 2008 07:12
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 06:45
		Re: inverse gradient By: erano on Tue, 02 December 2008 01:27
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:31
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:18
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:14
		Re: inverse gradient By: pgrigis on Fri, 28 November 2008 08:10
		Re: inverse gradient By: Jeremy Bailin on Fri, 28 November 2008 05:27
		Re: inverse gradient By: erano on Fri, 28 November 2008 01:31
		Re: inverse gradient By: Jeremy Bailin on Thu, 27 November 2008 06:24
		Re: inverse gradient By: pgrigis on Tue, 02 December 2008 14:44
		Re: inverse gradient By: erano on Tue, 09 December 2008 00:36
		Re: inverse gradient By: erano on Wed, 24 December 2008 01:55

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