| OCR Text |
Show 67 direction (since the terms in the of and Yv Solving to this to is result same Yu equal theta set to note search that the A simpler the first it that vector be is (du,dv) has vector therefore can First ways. theta=atan(du/dv) by setting zero. and the It angle found dY along expression). the maxima/minima to for of length distance optimal in included the of independent different two general expression the consider in derived be can been rewritten and local derivative with respect which method order achieves the Taylor expansions of zero. o = o = Yu(uo,vo) + (u-uo)Yuu + (v-vo)Yuv Yv{uo,vo) + (u-uo)Yuv + (v-vo)Yvv linear system u v for = = and u Uo + Vo + v we obtain du n dv n where Yv du solve given a directly substitution we second for can Yvv Yuv - Yuv2 Yv - Yuu = n is, Yu - Yvv Yuu Yu dv That Yuv = n Yvv Yuu approximation order the verify Yuv2 - stationary that A = n 1 point to Y(u,v) Yu=Yv=O. we By |
