Concepts

The conceptual reference covers the photographic and AgX-specific ideas the rest of the documentation builds on. It serves CLI users, preset authors, and curious photo nerds — readers who want to look up what a concept is, separately from the algorithmic how (covered under Explanation) and the field-level schema (covered by the auto-generated Preset format page).

Foundations

The substrate everything else relies on.

• Color spaces — Linear vs sRGB definitions, conversion formulas, and per-stage assignment.
• Color models — RGB, HSL, and luminance: when AgX uses each.

Photography lexicon

Short entries grouped by photographer-panel mental model. Tutorials and how-to guides cite these by anchor (e.g., color.md#white-balance).

• Tone — Exposure, contrast, highlights, shadows, whites, blacks, tone curves.
• Color — White balance, HSL, color grading.
• Detail — Sharpening, clarity, dehaze, noise reduction.
• Effects — Grain, vignette.

AgX-specific

Concepts that aren't covered by general photography references because they are AgX inventions or AgX integrations.

• Preset model — The three-part structure and the extends chain merge semantics.
• Render pipeline — The conceptual journey from decoded image to encoded output.
• LUT format — .cube syntax, trilinear interpolation, and supported sizes and features.