pixtreme-aces 0.8.5

ACES color management for pixtreme (OCIO ACES 1.2 compliant)

pixtreme-aces

ACES Color Management for pixtreme (OCIO ACES 1.2 Compliant)

Overview

pixtreme-aces provides professional ACES color management functionality for VFX and color grading workflows. It implements the Academy Color Encoding System (ACES) 1.2 standard with full GPU acceleration.

Features

• ACES 1.2 Compliance: Matrix values match OpenColorIO-Config-ACES standard
• Industry Standard Workflow: Compatible with Nuke, Houdini, Maya color pipelines
• GPU Accelerated: All operations run on CUDA-enabled GPUs via CuPy
• Type Preservation: Seamlessly works with both NumPy and CuPy arrays

Installation

Requirements:

• Python >= 3.12
• CUDA Toolkit 12.x
• NVIDIA GPU with compute capability >= 6.0

pip install pixtreme-aces

Requires pixtreme-core and CUDA Toolkit 12.x.

Quick Start

import pixtreme_aces as aces
import pixtreme_core as px

# Read display-referred image (Rec.709/sRGB)
img = px.imread("input.jpg")

# Convert to ACES2065-1 (scene-referred, linear AP0)
aces_img = aces.rec709_to_aces2065_1(img)

# Work in ACES color space
# ... color grading, compositing, etc.

# Convert back to Rec.709 for display
output = aces.aces2065_1_to_rec709(aces_img)

px.imwrite("output.jpg", output)

Color Space Conversions

ACES Working Spaces

• ACES2065-1: Archive format (linear AP0, wide gamut)
• ACEScg: CG/VFX working space (linear AP1)
• ACEScct: Grading space (log-encoded AP1)

# ACES2065-1 ↔ ACEScg
acescg = aces.aces2065_1_to_acescg(aces_img)
aces_img = aces.acescg_to_aces2065_1(acescg)

# ACES2065-1 ↔ ACEScct
acescct = aces.aces2065_1_to_acescct(aces_img)
aces_img = aces.acescct_to_aces2065_1(acescct)

References

• ACES Central
• ACES Technical Documentation
• OpenColorIO-Config-ACES
• SMPTE ST 2065-1: ACES2065-1 specification

License

MIT License - see LICENSE file for details.

ACES® is a trademark of the Academy of Motion Picture Arts and Sciences (A.M.P.A.S.). This software is not endorsed by A.M.P.A.S.

Links

• Repository: https://github.com/sync-dev-org/pixtreme