Hi, But,i fall in the trouble of vignetting recently.I find you use the > method of Function approximation.I look up some papers,the Function is > f(i,j) = cosh(rx*(x-x0))*cosh(ry*(y-y0)) +c .However,yours is > f(x,y)=p*(x-x0)^2 +q*(y-y0)^2 + c ----->> f(x,y)=AX*x^2 + BX*x + > AY*y^2 + BY*y + c. > Could i ask you how to get the Function ,and how to set the initial > value of AX、AY、BX、BY and C? >
I haven't dealt with this. Make test images and use them to estimate these values - look at the vignetting gradient function and pick several points and solve the system. Best regards, Oleg Dzhimiev Electronics Engineer phone: +1 801 783 5555 x124 Elphel, Inc.
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