Appeal No. 1999-2069
Application 08/397,639
ii) carrying out template matching, with which said
template regions are matched with the radiation images other
than said single radiation image,
iii) thereby obtaining at least three corresponding
points in each of the plurality of the radiation images,
iv) taking the corresponding points in a single
radiation image, which is among the plurality of the
radiation images, as reference corresponding points,
v) calculating factors of affine transformation with
the method of least squares, said affine transformation
being represented by the formula
− u ‚ − a b ‚ − x ‚ − e ‚
- - = - - - - + - -
‰ v ™ ‰ c d ™ ‰ y ™ ‰ f ™
wherein u and v represent the coordinates of the reference
corresponding point, x and y represent the coordinates of
the corresponding point to be transformed, a, b, c, and d
are the factors representing correction with a rotating
operation and correction with an enlargement or reduction
factor, and e and f are the factors representing correction
with parallel translation, and
vi) carrying out affine transformation, in which the
calculated factors of affine transformation are used, and
with which the values of coordinates of the corresponding
points in the radiation images other than said single
radiation image having the reference corresponding points
are transformed into values of coordinates of the reference
corresponding points such that the reference corresponding
points and the transformed corresponding points in the
radiation images other than said single radiation image
having the reference corresponding points may coincide with
one another;
wherein said affine transformation step is performed so
that each of enlargement or reduction, rotation, and
parallel translation of the radiation images, other than
said single radiation image, occur simultaneously.
- 3 -
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007