NEW: Pre-Alignment of an Image Pair

[ruqayya]

This pull request comprises a function to perform rough alignment of an image pair. The method implemented uses the centre of mass for finding the translation offset while the angular offset is found by trying a number of angles. The best angle is found on the basis of DICE overlap.

[codecov[bot]]

Codecov Report

Merging #427 (38b86fe) into develop (3bcd9ff) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #427   +/-   ##
========================================
  Coverage    99.62%   99.63%           
========================================
  Files           57       58    +1     
  Lines         5636     5688   +52     
  Branches      1032     1041    +9     
========================================
+ Hits          5615     5667   +52     
  Misses           9        9           
  Partials        12       12           

Impacted Files	Coverage Δ
tiatoolbox/tools/registration/__init__.py	100.00% <100.00%> (ø)
tiatoolbox/tools/registration/wsi_registration.py	100.00% <100.00%> (ø)

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