add callback to active contour model

[noahstier]

Description

Add an option for a callback function in active_contour.
The callback is called every (convergence_order + 1) iterations which in this case is every 11 iterations.

Checklist

• Clean style in the spirit of PEP8
• Docstrings for all functions
• Unit tests

References

implements enhancement #2092

[pep8speaks]

Hello @noahstier! Thanks for updating the PR.

• In the file skimage/segmentation/active_contour_model.py, following are the PEP8 issues :

Line 97:80: E501 line too long (80 > 79 characters)
Line 118:17: E127 continuation line over-indented for visual indent
Line 168:25: E131 continuation line unaligned for hanging indent
Line 169:25: E131 continuation line unaligned for hanging indent
Line 261:20: E128 continuation line under-indented for visual indent

• In the file skimage/segmentation/tests/test_active_contour_model.py, following are the PEP8 issues :

Line 19:13: E128 continuation line under-indented for visual indent
Line 32:13: E128 continuation line under-indented for visual indent
Line 45:13: E128 continuation line under-indented for visual indent
Line 64:13: E128 continuation line under-indented for visual indent
Line 70:13: E128 continuation line under-indented for visual indent
Line 74:13: E128 continuation line under-indented for visual indent
Line 87:14: E128 continuation line under-indented for visual indent
Line 88:14: E128 continuation line under-indented for visual indent
Line 91:13: E128 continuation line under-indented for visual indent
Line 92:13: E128 continuation line under-indented for visual indent
Line 95:13: E128 continuation line under-indented for visual indent
Line 96:13: E128 continuation line under-indented for visual indent
Line 106:29: E127 continuation line over-indented for visual indent
Line 108:29: E127 continuation line over-indented for visual indent

Comment last updated on March 27, 2017 at 02:58 Hours UTC