Lazy load color

[nfahlgren]

Describe your changes
PR adds a new class for color data CLR that is used with PSII_data to lazy load the color image on-demand.

ps = pcv.photosynthesis.read_cropreporter("PSII_HDR_020321_WT_TOP_1.INF")
print(ps.clr)
# CLR(filepath='PSII_CLR_020321_WT_TOP_1.DAT', loaded=False)
pcv.plot_image(ps.clr.color)  # plot image
print(ps.clr)
# CLR(filepath='PSII_CLR_020321_WT_TOP_1.DAT', loaded=True)

Type of update
Is this a: New feature or feature enhancement

Associated issues
#1926

For the reviewer
See this page for instructions on how to review the pull request.

• PR functionality reviewed in a Jupyter Notebook
• All tests pass
• Test coverage remains 100%
• Documentation tested
• New documentation pages added to plantcv/mkdocs.yml
• Changes to function input/output signatures added to updating.md
• Code reviewed
• PR approved

[deepsource-io]

DeepSource Code Review

We reviewed changes in d5434a2...5fe97be on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene   Coverage

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
Python		May 26, 2026 9:17p.m.	Review ↗
Code coverage		May 26, 2026 9:17p.m.	Review ↗

Code Coverage Summary

Language	Line Coverage (New Code)	Line Coverage (Overall)
Aggregate	100% [✓ above threshold]	99.9% [▼ down 0.1% from main]
Python	100% [✓ above threshold]	99.9% [▼ down 0.1% from main]

➟ Additional coverage metrics may have been reported. See full coverage report ↗

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[joshqsumner]

Looks good!