Implement TissueMask mask for Tile with type dispatcher

[alessiamarcolini]

Description

Now is possible to use the TissueMask mask also on Tiles:

from histolab.masks import TissueMask
from histolab.tile import Tile

tile = Tile(pil_img, None, None)
tissue_mask = TissueMask()

result = tissue_mask(tile) # same dimensions as the tile

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Documentation

Issues Fixed or Closed by This PR

• Fixes: TissueMask mask on Tile #311

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[codecov]

Codecov Report

Merging #313 (c557145) into master (a7dc352) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #313   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines         1272      1284   +12     
  Branches       124       124           
=========================================
+ Hits          1272      1284   +12     

Impacted Files	Coverage Δ
src/histolab/filters/compositions.py	100.00% <100.00%> (ø)
src/histolab/masks.py	100.00% <100.00%> (ø)
src/histolab/slide.py	100.00% <100.00%> (ø)
src/histolab/util.py	100.00% <100.00%> (ø)

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[ernestoarbitrio]

please address the minor comment

[lgtm-com]

This pull request fixes 1 alert when merging 959b712 into f86c65e - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'

[alessiamarcolini]

hey @ernestoarbitrio what do I do with this CodeFactor issue?

src/histolab/filters/compositions.py#L91
Unnecessary pass statement (unnecessary-pass)

I wanted that method for the sake of the documentation, can I achieve the same result in another way?

[lgtm-com]

This pull request fixes 1 alert when merging 7df6bac into f86c65e - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'

[lgtm-com]

This pull request fixes 1 alert when merging f187c3c into f86c65e - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'

[lgtm-com]

This pull request fixes 1 alert when merging a1cc719 into f86c65e - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'

[lgtm-com]

This pull request fixes 1 alert when merging 6c3ae1a into f86c65e - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'

[lgtm-com]

This pull request fixes 1 alert when merging 138c3f2 into f86c65e - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'

[lgtm-com]

This pull request fixes 1 alert when merging c557145 into a7dc352 - view on LGTM.com

fixed alerts:

• 1 for Module is imported with 'import' and 'import from'