Compress TIFFs on save

[qin-yu]

Hi @carsen-stringer,

I made this small change because it saves a huge amount of storage in my projects. Segmentations compress really well, e.g. a 3D segmentation of (263 x 1024 x 1024) drops from 526 MB to 2.5 MB when using zlib with tifffile.imwrite(), about a 99.5% reduction.

I think most users saving segmentations with Cellpose would benefit from this, since the main bottleneck is usually I/O, not compression speed.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 52.69%. Comparing base (95e2f60) to head (84e8589).
Report is 45 commits behind head on main.

Files with missing lines	Patch %	Lines
cellpose/io.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1131      +/-   ##
==========================================
+ Coverage   52.68%   52.69%   +0.01%     
==========================================
  Files          18       18              
  Lines        4328     4342      +14     
==========================================
+ Hits         2280     2288       +8     
- Misses       2048     2054       +6     

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[carsen-stringer]

thank you!