PNG compression for arbitrary number of channels

[farizrahman4u]

🚀 🚀 Pull Request

Checklist:

• My code follows the style guidelines of this project and the Contributing document
• I have commented my code, particularly in hard-to-understand areas
• I have kept the coverage-rate up
• I have performed a self-review of my own code and resolved any problems
• I have checked to ensure there aren't any other open Pull Requests for the same change
• I have described and made corresponding changes to the relevant documentation
• New and existing unit tests pass locally with my changes

Changes

https://activeloop.atlassian.net/browse/AL-1272

Uses apng to compress image arrays with arbitrary number of channels. Does not support reading APNG images from file.

API:

Stacked binary masks are expected to have shape (height, width, nframes)

import hub
ds = hub.dataset("mem://test")
ds.create_tensor("binary_masks", sample_compression="apng")
with ds:
    for _ in range(10):
        ds.binary_masks.append(np.random.randint(0, 2, (100, 100,  713), dtype="uint8"))

RGB/RGBA frames should have shape (nframes, height, width, nchannels)

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #1252 (d6cac3b) into main (c9ef99b) will increase coverage by 0.01%.
The diff coverage is 95.45%.

@@            Coverage Diff             @@
##             main    #1252      +/-   ##
==========================================
+ Coverage   91.64%   91.66%   +0.01%     
==========================================
  Files         135      135              
  Lines        9074     9118      +44     
==========================================
+ Hits         8316     8358      +42     
- Misses        758      760       +2     

Impacted Files	Coverage Δ
hub/api/tests/test_api.py	99.37% <ø> (ø)
hub/core/compression.py	89.92% <93.93%> (+0.33%)	⬆️
hub/compression.py	96.87% <100.00%> (+0.10%)	⬆️
hub/core/tests/test_compression.py	100.00% <100.00%> (ø)

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[verbose-void]

concise