Alessia Marcolini

Added new Italian conference into the European section: PyCon Italy

Fix validation loss calculation

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Fixes issue #4

Update Contributing guidelines after poetry migration

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## Description per title ## Types of Changes - [ ] Core - [ ] Bugfix - [ ] New feature - [ ] Enhancement/optimization - [x] Documentation ## Issues...

Add stain normalization with Reinhard's method

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## Description Add stain normalization with Reinhard's method 🚨 This PR depends on #394, which should be merged first!! ## Types of Changes - [ ] Core - [ ]...

**Describe the bug** `LocalOtsuThreshold` should return a binary mask as `np.ndarray`, like its "sibling" `OtsuThreshold` 1. We should not apply `np_to_pil` before returning, but `threshold_to_mask` (like `OtsuThreshold`) 2. The docstrings...

[Paper](https://ieeexplore.ieee.org/document/946629)

Stain normalization: Macenko

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[paper](http://wwwx.cs.unc.edu/~mn/sites/default/files/macenko2009.pdf)

We need to add `near_zero_var_threshold` parameter to the `Tiler` in order to control the minimum image variance after morphological operations (in case `check_tissue=True`)

try to support python 3.8 under windows

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## Description ## Types of Changes - [ ] Core - [ ] Bugfix - [ ] New feature - [x] Enhancement/optimization - [ ] Documentation ## Issues Fixed or...