# `cogpy.preprocess`

Signal preprocessing: bandpass/notch filtering, spatial smoothing, common
median reference, z-score normalization, bad-channel detection, interpolation,
line-noise removal, and resampling.

**Guide:** {doc}`/howto/filtering` |
**Tutorial:** {doc}`/tutorials/bad-channel-detection` |
**Design:** {doc}`/explanation/preprocessing-pipeline`

## Submodules

```{eval-rst}
.. autosummary::
   :recursive:

   cogpy.preprocess.badchannel
   cogpy.preprocess.filtering
   cogpy.preprocess.interpolate
   cogpy.preprocess.linenoise
   cogpy.preprocess.resample
```

```{eval-rst}
.. automodule:: cogpy.preprocess
   :members:
   :undoc-members:
   :show-inheritance:
   :noindex:
```