ComfyUI Save Image Extended — AdobeRGB TIFF16

A ComfyUI custom node for saving images with true Adobe RGB (1998) color space conversion, embedded ICC profiles, and 16-bit per channel output. Supports PNG, TIFF, JPEG, WebP, AVIF, JXL, and more.

What This Node Does

Save Image Extended AdobeRGB takes any image output in ComfyUI and saves it with proper color management. When you select Adobe RGB 1998, the node performs a real mathematical conversion from sRGB — it does not just tag the file with a different profile.

The conversion pipeline:

ComfyUI image (sRGB float)
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Linearize (undo sRGB transfer function)
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3x3 matrix transform (sRGB linear -> Adobe RGB linear, D65)
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Clamp [0, 1]
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Apply Adobe RGB gamma (563/256 = 2.19921875)
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Quantize to 16-bit (0-65535) or 8-bit (0-255)
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Encode TIFF/PNG with embedded ICC profile (tag 34675)

Node Controls

| Parameter | Description | |---|---| | color_space | sRGB or Adobe RGB 1998 — selects color pipeline and ICC profile | | bit_depth | 8 or 16 — 16-bit available for PNG and TIFF only | | output_ext | .png, .tiff, .webp, .jpg, .jpeg, .j2k, .jp2, .gif, .bmp, .avif, .jxl | | quality | 0-100 — applies to lossy formats; PNG maps to compress level 0-9 | | filename_prefix | Fixed string prefix for output filename | | filename_keys | Comma-separated sampler keys for dynamic filenames (e.g. sampler_name, cfg, steps) | | foldername_prefix / foldername_keys | Same templating for output subfolder structure | | save_metadata | Embed prompt/workflow data into the file | | save_job_data | Save generation parameters to jobs.json | | counter_digits / counter_position | Auto-incrementing file counter (e.g. 0001) | | named_keys | Prefix values with key names in filename (e.g. seed=123-cfg=7.5) |

What We Added

This node is based on Save Image Extended by AudioscavengeR (original concept by @thedyze). The original node's TIFF output was broken and did not support color-managed workflows. We rebuilt the TIFF pipeline from scratch and added:

• True sRGB to Adobe RGB (1998) color space conversion — vectorized NumPy implementation with correct sRGB linearization, 3x3 chromaticity matrix (D65, no adaptation needed), and Adobe RGB gamma encoding using the exact value 563/256
• Hand-built ICC v2.1 profile — constructed from scratch in pure Python with all 9 required tags (desc, wtpt, rXYZ, gXYZ, bXYZ, rTRC, gTRC, bTRC, cprt), Bradford-adapted D50 primaries, and proper s15Fixed16 encoding
• 16-bit TIFF output — via tifffile with ICC profile embedded as TIFF tag 34675
• 16-bit PNG output — via imagecodecs with ICC profile injected as an iCCP chunk
• 8-bit ICC embedding — all Pillow-based formats (JPEG, WebP, AVIF, JXL, TIFF 8-bit) receive the correct ICC profile
• Fixed TIFF save — the original node's TIFF export was non-functional; this version writes valid TIFF 6.0 files

All filename templating, folder generation, metadata embedding, and job data features from the original Save Image Extended are preserved.

Related Projects

Save-TIFF Node

Our standalone ComfyUI Save TIFF node is a minimal, dependency-light TIFF saver (NumPy only — no Pillow required). It was developed alongside this project and shares the same color conversion math and ICC profile builder. The Save-TIFF node has been merged into this extended version, which adds multi-format support and the full filename templating system.

Live Web Demo

Try the color conversion and TIFF export in your browser: scuffedepoch.com/adobe-tiff16/

The web demo uses the same sRGB-to-Adobe-RGB pipeline (linearize, matrix, gamma) implemented in JavaScript, and generates downloadable 16-bit TIFF files with embedded ICC profiles — no installation required.

Installation

ComfyUI Manager

Search for Save Image Extended AdobeRGB in ComfyUI Manager and install.

Manual

Clone into your ComfyUI custom nodes directory:

cd ComfyUI/custom_nodes
git clone https://github.com/MushroomFleet/ComfyUI-Save-Extended-TIFF16-adobe-rgb.git
pip install -r ComfyUI-Save-Extended-TIFF16-adobe-rgb/requirements.txt

Dependencies

numpy
tifffile
imagecodecs
pillow
piexif
pillow-avif-plugin  (optional — enables AVIF)
pillow-jxl-plugin   (optional — enables JXL)

tifffile is required for 16-bit TIFF. imagecodecs is required for 16-bit PNG. If either is missing, the node falls back to 8-bit for that format.

Credits

• AudioscavengeR — Save Image Extended (original node, GPL-3.0). Filename templating, folder generation, metadata embedding, and multi-format save logic are derived from this project. Original concept by @thedyze.
• Drift Johnson (MushroomFleet) — Adobe RGB color conversion, ICC profile builder, 16-bit TIFF/PNG pipeline, TIFF fix.

License

MIT

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