feat: Add image hashing functions with support for 5 algorithms

[codekshitij]

Changes Made

Adds image hashing functionality to Daft with support for 5 algorithms: average, perceptual, difference, wavelet, and crop_resistant.

API Usage

from daft.functions import image_hash
from daft import col

# Default algorithm (average)
df = df.with_column("hash", image_hash(col("image")))

# Specific algorithm
df = df.with_column("hash", image_hash(col("image"), "perceptual"))

Implementation

• New daft.functions.image_hash() function
• Rust backend implementation in daft-image
• 12 comprehensive tests covering all algorithms
• Proper error handling and type validation

Related Issues

https://github.com/Eventual-Inc/Daft/issues/4889

Checklist

• [ ] Documented in API Docs (if applicable)
• [ ] Documented in User Guide (if applicable)
• [ ] If adding a new documentation page, doc is added to docs/mkdocs.yml navigation
• [ ] Documentation builds and is formatted properly (tag @/ccmao1130 for docs review)

[codecov[bot]]

Codecov Report

:x: Patch coverage is 80.89552% with 64 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 74.50%. Comparing base (70116a6) to head (3f993b0). :warning: Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/daft-image/src/ops.rs	83.95%	39 Missing :warning:
src/daft-image/src/functions/hash.rs	73.21%	15 Missing :warning:
src/daft-image/src/series.rs	67.74%	10 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5229      +/-   ##
==========================================
+ Coverage   74.48%   74.50%   +0.01%     
==========================================
  Files         969      970       +1     
  Lines      124225   124558     +333     
==========================================
+ Hits        92535    92803     +268     
- Misses      31690    31755      +65     

Files with missing lines	Coverage Δ
daft/expressions/expressions.py	97.05% <ø> (ø)
daft/functions/__init__.py	100.00% <100.00%> (ø)
daft/functions/image.py	93.10% <100.00%> (+0.51%)	:arrow_up:
daft/series.py	92.77% <ø> (ø)
src/daft-image/src/functions/mod.rs	100.00% <100.00%> (ø)
src/daft-image/src/series.rs	75.90% <67.74%> (-1.88%)	:arrow_down:
src/daft-image/src/functions/hash.rs	73.21% <73.21%> (ø)
src/daft-image/src/ops.rs	75.15% <83.95%> (+8.48%)	:arrow_up:

... and 5 files with indirect coverage changes

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[universalmind303]

hey @codekshitij i added comments on the other PR that got closed. Could you address these issues?

https://github.com/Eventual-Inc/Daft/pull/5227

[codekshitij]

hey @codekshitij i added comments on the other PR that got closed. Could you address these issues?

#5227

Hey i got all your suggestion and will work on that ASAP.

[codekshitij]

Thank you all for the review. And I'll fix it all ASAP. @rchowell @srilman @universalmind303

[malcolmgreaves]

Hi @codekshitij 👋 Just checking in -- how is this one going?

[codekshitij]

Hi @codekshitij 👋 Just checking in -- how is this one going? Sorry for the delay, I'll commit the changes by the end of this week.

[madvart]

Hey @codekshitij - Checking in on this.

[madvart]

Hey @codekshitij - Checking to see if you are able to push this through? Thanks!