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. Author manuscript; available in PMC: 2015 Jun 14.
Published in final edited form as: IEEE Trans Image Process. 2015 Feb;24(2):757–769. doi: 10.1109/TIP.2014.2387019

Fig. 2.

Fig. 2

When the two circles in (a) are to be aligned, the conventional MI objective function in (b) fails to show a peak at the correct point of alignment, whereas the proposed method in (c) has the desired peak. Note that the values in (b) and (c) are plotted with respect to the x and y translation of the dark circle (top (a)) against the gray circle (bottom (a)).