Fix multi-channel compositing and add per-channel norm support - #451

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bugfix/issue450-feature-pca-aggregation-for-n-4-channels-in-render_images

Commits on Mar 19, 2026

Unify multi-channel compositing to additive blending and add per-channel norm

timtreis
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claude
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92cb5eb
Remove unused percentiles_for_norm field and deprecation alias

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f2f3f1a
Update CI-generated baseline images for additive blending compositing

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becae8d
Use signal-based compositing for correct blending with any colormap

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ca7882b
Add tests for 5-channel compositing and per-channel normalization

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026a28d
Address review: deduplicate cmap(0) call, add error tests, trim warning

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8da18d2
Use Color.get_alpha_as_float() instead of comparing internal hex string

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fe75761
Reject tuple norms with clear error, standardize na_is_transparent guards

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c3f978e
Add CI-generated baseline images for signal-based compositing tests

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09519d8
Clean up comments: remove AI-style symbols and reword unclear comments

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fd051a2
Add empty-layers guard to _additive_blend, clarify scalar_norm comment

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11dbd79