search

ewaybotYan / opencl-book-samples

Automatically exported from code.google.com/p/opencl-book-samples
0 stars 0 forks source link

Errata: errors in optical flow equation (p. 470) #78

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago 
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