[IMG311] Refactor gamma filter to use parameterized function

Zhang, Chenrequested to merge
IMG311_refactor_gammafilter into next
  • Original Gitlab Story: IMG311

This PR introduces the following changes: [main]:

  • update gamma_filter to use param.ParameterizedFunction
  • update corresponding unit test to following repo convention [minor]:
  • add more information to how to use param.ParameterizedFunction in dev doc
  • fix a few typos in docstrings in other module

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