numpy / numpy/numpy

normalized cross-correlation (Trac #1714)

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01 - Enhancement component: numpy._core Patch
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Description

Original ticket http://projects.scipy.org/numpy/ticket/1714 on 2011-01-15 by trac user bubla, assigned to unknown.

Hello,
I have made a patch that extends the correlate function so it can compute normalized cross-correlation now
See [http://en.wikipedia.org/wiki/Cross-correlation#Normalized_cross-correlation the Wikipedia article].

I have added documentation and simple doctest too, of course.
The patch is against the latest master Git

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the current correlate function and review how its documentation and doctest are organized. Compare the requested normalized cross-correlation behavior with the linked Wikipedia description. Done means correlate supports the requested calculation and its documentation and doctest are updated and passing.

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Assessment

Tech stack
python
Domain
data
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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