[x264-devel] Re: question about intraprediction 16x16 plane

[Loren Merritt]

On Mon, 20 Nov 2006, Shirley S. Fung wrote:

> I have been using the white paper from http://www.vcodex.com/h264.html, and
> I don't understand how the plane function is implemented. Any help?

The "plane" in plane prediction is the normal mathematical sense of a 
plane. i.e. a function of 2 variables, f(x,y) = a*x+b*y+c.
Plane prediction does linear regression on the top and left edge pixels to 
find the parameters a,b,c that best match them, and uses the corresponding 
f(x,y) to predict the content of the macroblock.

--Loren Merritt

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