Errata: errors in optical flow equation (p. 470)

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I spotted two errors in the book regarding the residual error equation (Optical 
flow, p 470)

The double summation currently has this expression (I(x,y) - J(x+dx+dy))^2, but 
I think this should be (I(x,y) - J(x+dx, y+dy))^2  (two parameters are needed 
to find a location in J, not one)

Also, in the line below it says that there is a window of size (wx, wy), but 
since the summation goes from x=ux-wx to x=ux+wx, the window is actually of 
size 2*wx, 2*wy

HTH

Original issue reported on code.google.com by lexvande...@gmail.com on 11 Jul 2013 at 11:29