Multimodal Medical Image Registration Based on an Information-Theory Measure with Histogram Estimation of Continuous Image Representation

Figure 2

Process of joint histogram estimations in 3D. (a) Cube. (b) Six tetrahedrons divided from the cube. (c) Intersecting line between two isointensity surfaces (plotted by the solid and dashed lines) with the distance of two black dots (two crossing points between the intersecting line and the tetrahedron) of the segment length.

(a)

(b)

(c)