[x264-devel] Re: Integral projection

[Florian Seitner]

Thanks Loren! 

I guessed so. I am currently working on H.264 encoder for an embedded
chip. The available resources (memory/cache sizes/..) are quite limited
and an extra computation of an integral image for each frame quite
costly. 

Maybe integral projections for fast block matching would be a good
feature to add in x264. They are probably quite useable in embedded
solutions since they are updated locally and do not require as much
memory as e.g. a whole integral images. In case that there is enough
memory available to compute the integral images, we could also use them
for computing the integral projections... .

Is there a plan to implement integral projections (someone out there who
is working on this?)?

  Florian




-----Original Message-----
From: Loren Merritt [mailto:lorenm at u.washington.edu] 
Sent: Dienstag, 16. Mai 2006 22:24
To: x264-devel at videolan.org
Subject: [x264-devel] Re: Integral projection

On Mon, 15 May 2006, Florian Seitner wrote:

>  I have a question regarding the integral images used in the x264
> project. How are they used exactly? Are they used to compute the SAD
or
> like integral projections?

It is used the compute SAD during successive elimination motion search.

--Loren Merritt

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