Compression - Talking about prediction

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Talking about prediction

none

2005-11-03, 3:55 am

Could you share your prediction matrix which you use for the pixel
prediction.
I am desperately searching for a nonlinear predictor (3 x 3 pixels) for
grey pixels.

jdallen2000@yahoo.com

2005-11-09, 7:55 am

none wrote:
> Could you share your prediction matrix which you use for the pixel
> prediction.
> I am desperately searching for a nonlinear predictor (3 x 3 pixels) for
> grey pixels.

Here's a *very* simple non-linear predictor using just 3 pels:
A B
C ?

B + C - median(A,B,C) is a fairly good predictor of the target.
This function can be phrased in many ways and, I think, has been
"reinvented" many times. Amazingly, this *extremely*
simple non-linear predictor may outperform big, tuned linear
predictors. It makes one wonder if the linear predictors
are sometimes used in spite of themselves, just out
of some idea of "mathematical purity."

James

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