wassname/scikit-image
1
0
Fork 0
mirror of https://github.com/wassname/scikit-image.git synced 2026-08-06 13:30:21 +08:00
Code Issues Packages Projects Releases Wiki Activity

DOC: typo

Browse Source
This commit is contained in:
François Boulogne
2014-03-16 15:15:42 -04:00
parent 3102dcad8d
commit 452fcdaba8
1 changed files with 8 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
skimage/transform/_geometric.py
+8 -8
View File
@@ -489,11 +489,11 @@ class PiecewiseAffineTransform(GeometricTransform):
class SimilarityTransform(ProjectiveTransform):
"""2D similarity transformation of the form::
X = a0*x - b0*y + a1 =
= m*x*cos(rotation) + m*y*sin(rotation) + a1
X = a0 * x - b0 * y + a1 =
= m * x * cos(rotation) - m * y * sin(rotation) + a1
Y = b0*x + a0*y + b1 =
= m*x*sin(rotation) + m*y*cos(rotation) + b1
Y = b0 * x + a0 * y + b1 =
= m * x * sin(rotation) + m * y * cos(rotation) + b1
where ``m`` is a zoom factor and the homogeneous transformation matrix is::
@@ -560,13 +560,13 @@ class SimilarityTransform(ProjectiveTransform):
The transformation is defined as::
X = a0*x - b0*y + a1
Y = b0*x + a0*y + b1
X = a0 * x - b0 * y + a1
Y = b0 * x + a0 * y + b1
These equations can be transformed to the following form::
0 = a0*x - b0*y + a1 - X
0 = b0*x + a0*y + b1 - Y
0 = a0 * x - b0 * y + a1 - X
0 = b0 * x + a0 * y + b1 - Y
which exist for each set of corresponding points, so we have a set of
N * 2 equations. The coefficients appear linearly so we can write