Deepcell

Bugfixes

- Pin OpenCV <= 3.4.9.31 for wider Python support (52)

Bugfixes

- Speed up `erode_edges` by using `skimage.segementation.find_boundaries` (46).
- Add a `pyproject.toml` file to support installation on python < 3.6. (47).

Features
- Add `CroppingDataGenerator` to randomly crop form the source images. (413)
- `SemanticDataGenerator` supports multiple labels. (344)
- Update the `MultiplexSegmentation` application with new weights and post-processing (407, 413, 422, 424, 425, 429, 431)
- Added the `SemanticMovieDataGenerator` for 3D data. (419)

Bugfixes
- Updated README typos and URLs. (401, 402)
- Move `compute_overlap` to `deepcell_toolbox`. (409)
- Improve performance of `pixelwise` transform. (415)
- Fix `PanopticNet` model for 3D data. (416)
- Pin version of opencv for better python compatibility (422)

🧰 Maintenance

<details>
<summary>Drop support for python 3.6 and bump deepcell-toolbox requirement msschwartz21 (94)</summary>

Updates deepcell-toolbox to ~=0.11.2.
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🐛 Bug Fixes

<details>
<summary>Add additional metrics to report in classify_divisions msschwartz21 (92)</summary>

Addresses 91 and bumps version to 0.5.6 for the next patch release after this PR is complete. I tested the new functionality in the model-registry and those updates can be seen in this branch: https://github.com/vanvalenlab/model-registry/compare/mrgn/tracking-evaluation. I added rounding after running this test, but decimals will now be truncated to 2 digits.
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🧰 Maintenance

<details>
<summary>Bump copyright to 2022 and improve error message msschwartz21 (90)</summary>


</details>

🐛 Bug Fixes

<details>
<summary>Update `utils.trk_stats` to return a dictionary of stats as output msschwartz21 (89)</summary>

The `trk_stats` function originally printed stats, but did not return them to the user. This PR updates the function to return a dictionary of statistics and makes it possible to input `X`, `y` and `lineages` instead of loading the data from `filename`.
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