Figure 5
Interpolation of rotated and translated data. A: The original data set. B: A magnification of one pixel 
of the rotated data and its surrounding four projections of the original data, 
to 
The triangles M
k
consisting of three of the projections 
are indicated by the dotted lines. D: The rotated data set with C90 located in the origin. C: The sum ζ
k
of the three angles at to the three points of a triangle is 2π.