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Image MIME Reference
ACES

ACES Image Container File

image/aces
VS

Fuji Xerox EDMICS-MMR

image/vnd.fujixerox.edmics-mmr
EDMICS-MMR

A complete technical comparison of ACES Image Container File and Fuji Xerox EDMICS-MMR — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature ACES EDMICS-MMR
Transparency (Alpha) Yes ✕ No
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support Yes ✕ No
EXIF Metadata ✕ No ✕ No
ICC Color Profile ✕ No ✕ No
ACES Image Container File
image/aces
Extension
.exr
Container OpenEXR (SMPTE ST 2065-4)
Compression Lossless / Uncompressed
Algorithm
PIZZIPRLEB44Uncompressed
Color Depth 16-bit (Half-float), 32-bit (Float)
Developed by Academy of Motion Picture Arts and Sciences (AMPAS) / SMPTE
Released 2013
Magic Bytes
76 2F 31 01
Full ACES reference →
Fuji Xerox EDMICS-MMR
image/vnd.fujixerox.edmics-mmr
Extension
.mmr.edm
Container Fuji Xerox EDMICS Wrapper
Compression Modified Modified READ (MMR / Group 4 Fax)
Algorithm
MMR (ITU-T T.6 / CCITT Group 4)
Color Depth 1-bit (Monochrome / Bi-level)
Developed by Fuji Xerox Co., Ltd.
Released 1990s
Magic Bytes
Unknown (Proprietary Container wrapped around MMR bitstream)
Full EDMICS-MMR reference →

Browser Support Comparison

Browser ACES EDMICS-MMR
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
ACES

ACES Strengths

  • Industry standard for high-end visual effects, compositing, and color grading
  • Supports 16-bit half-float data, accurately capturing immense dynamic range without clipping
  • Standardized by SMPTE (ST 2065-4) to guarantee universal color interoperability across different post-production facilities
Limitations
  • Considerably larger file sizes than conventional consumer image formats
  • Completely unsupported in web browsers and most standard desktop viewers
  • Requires specialized compositing or color grading software to interpret and view the scene-linear data correctly
EDMICS-MMR

EDMICS-MMR Strengths

  • Utilized the highly efficient MMR (Group 4) algorithm, which allowed massive, E-size engineering blueprints to be compressed into tiny file sizes suitable for 1990s hard drives and networks
  • Deeply integrated into Fuji Xerox hardware and database systems for seamless scan-to-archive workflows
Limitations
  • Completely proprietary and closed-source, making modern archival extraction and migration extremely difficult
  • No support in modern image processing libraries like ImageMagick, libvips, or standard TIFF viewers without first stripping the proprietary header
  • Strictly limited to 1-bit monochrome images

When to choose which format

ACES
Use ACES when…
  • Visual Effects (VFX)
  • Digital Intermediate (DI)
  • Color Grading
  • Archival
EDMICS-MMR
Use EDMICS-MMR when…
  • Fuji Xerox EDMICS Enterprise Systems
  • Archival of Large-Format Engineering Drawings
  • Legacy Corporate Document Scanning Pipelines

More comparisons

ACES vs APNG → EDMICS-MMR vs APNG → ACES vs AVCI → EDMICS-MMR vs AVCI → ACES vs AVCS → EDMICS-MMR vs AVCS → ACES vs AVIF → EDMICS-MMR vs AVIF → All comparisons →
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