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Three changes made to bisection search: #74

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Three changes made to bisection search: #74

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Wendazhang33
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  • Stop searching contour when the width of window reaches a threshold instead of exceeding the domain; a big speedup
  • Switch to the lower limit when limit difference below the threshold. In many cases, cd or CI change rapidly around the target contour, so the contours of the two limits may be very different although their values are close.
  • Use both coherency index (CI) and convexity deficiency (cd) for the rclv boundary criterion. Users can set CI as "-np.inf" if don't need it.

@Wendazhang33
Three changes made to bisection search:
3a29604 
 * Add a limit to the width of search window, a big speedup
 * Switch to the lower limit when limit difference below the threshold
 * Add coherency index for the rclv boundary criterion
@Wendazhang33
Change a comment
c6a191b
@Wendazhang33
Add cd into the parameters of find_convex_contours
b3da7cb
@Wendazhang33
Change the definition of CI using minimum variance for normalizaton
4d1eb55 
fix the multiple contours with same value problem
fix the contour_level=0 problem
@Wendazhang33
Add particle spacing parameters
5832a83
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@Wendazhang33